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Windows 10 system - Dual Boot

Windows Tips & Tricks

Windows 10 system - Dual Boot

»» 15.SEPT.2016 / updated: 11.DEC.2019

Windows 10 system - Dual Boot: How to use newer and earlier versions of Windows (Xp, Win7, 8.1, 10) and other systems such as Linux / Windows to run and start side by side on a single disk, but on a separate partition.

General presentation

Dual boot is a configuration in which two or more operating systems can be installed on one computer. If you do not want to replace the current version of Windows and use the old version or you are currently using Linux, but you want to try the new Windows functions, you can configure a dual boot configuration. Just create an additional partition.

The benefits of dual boot configuration on a physical partition or hard disk include full access to hardware, which includes the input / output performance of memory, graphics, and local disk. In addition, it is possible to fully experience all the features of the operating system that are not available in a virtual environment. The biggest benefit is that you don't miss another install (Windows or Linux), but you can switch between systems at any time after restart. It's so simple.

Configuring systems in Dual Boot

Since the drive will have at least two systems (Windows 8 / Windows 10 or Windows / Linux), you must first install the older system and then the newer one, because the newer one is obviously smarter and recognizes the older one, but the old does not recognize the new.

Why this rule? This way, and in no other way, a dual boot menu is created that allows you to choose between the two systems when you turn on your computer.

dual boot

Partition, unit division

a.) Because more systems will be installed, and personal data on the hard disk or SSD, must have a separate partition, you need at least three partitions.

b.) If personal backup data is stored in an external drive or in a USB flash drive larger, two partitions are sufficient, which can be an SSD of less than 120 GB.

c.) However, if you have a smaller drive, such as an SSD 120 GB may not be enough, especially if you are a passionate player, where the game itself can occupy more than 30 GB, along with other programs and the system, so leave 80 GB for the main system and leave 40 Gb for secondary system testing. Thus, the size may be sufficient.

Recommended actions before installing Windows

A.) Change HDD to SSD. If your laptop or computer has a hard drive old disk, HDD (Hard Disk Drives), the best option is to replace it with a super fast SSD (Solid State Drive) before installing Windows, which significantly reduces your computer's boot time so that it will be lightning quickly, and the programs will literally receive wings. While it may take a few minutes to start up the system with a hard disk, it can be shortened to a few seconds with a new SSD, generally being at least five times faster than a hard disk. The old HDD should not be discarded, it can still be used in an external USB enclosure (or mount it on a DVD player you never use).

B.) RAM extension. With little RAM, your computer or laptop becomes slow because the system it consumes in the background, so it runs out of memory, it will use cache, which will become as slow, especially when stored on an HDD. The solution for this is the RAM extension, but be careful to be compatible with the existing type. Remove a memory module from your computer or laptop after power failure, disassemble the case and buy the same as the existing one, or rely on a specialist.

C.)Silently installed programs. If not just replace the hard drive with SSD, but you also want to hurry up the installation of your favorite programs, read this article on this page. Installing programs in "Silent" mode

File Backup

The installation process in Dual Mode will delete everything from the main drives, so before you start, make a backup of the files before you start, to reduce the risk of a problem and prevent data loss:

A.) If you have another partition other than the main drive (which is usually marked with C:/ in This PC (MyComputer), copy your important data to that partition (images, documents), programs and other files).

B.) If there is no such possibility because you did not partition the previous disk but have an external hard disk or a flashdrive or a larger USB drive, copy and save the important data on it.

C.) If you do not have this option, but have an internet connection, the easiest way is to move the data to the OneDrive folder or to cloud storage, where you can easily restore your data with a few mouse clicks after installing Windows.

With the operating system (Windows) currently installed and used, do the following:

1.) Click the OneDrive cloud icon in the Taskbar. (Right, down, near the clock).

2.) Click the More menu in the pop-up window.

3.) Then, in the new window, click the Settings link.

Click the Settings link

4.) Click the Backup tab in the top menu, in the newly appeared window.

5.) Then click Manage backup.

Click Manage Backup

In the next window, click the folders in the middle to copy and save any file. (If you are using OneDrive Online Backup for the first time, you must first click the Turn on Backup button at the bottom right to start)

Click the middle folders to copy

Quick Tip: Of course, if your computer is new and no system has been installed, in this case, the OneDrive process above will not work (because it is not installed).

Preparation for installation in Dual Mode

First, you will need a Windows 10 product key. If you don't have one, you need to buy a valid license from the Microsoft Store or another reseller. It is recommended that you buy Microsoft Windows 10 Pro, as it includes all the features of Windows 10 Home + built-in security against threats, includes BitLocker, Windows Defender antivirus and many other features that support the creation of the virtual environment, that is to say virtual machines at no extra cost you can create and run Hyper-V.

Activating Windows 10 requires a 25-digit code or a digital license called a product key. The code looks like this and all the others are similar, consisting of numbers and letters: C9C9C-C9C9T-C97C9-C9C9T-C9C9T. Buy Windows 10 product key ...

Quick tip: Reinstalling Windows can cause problems if you do not know where the system license key is. If you have already purchased a license key and activated Windows, it is stored in the system and can be found with the ProduKey software. It can be used without installation and has a clear and easy-to-use interface, which does not require any more detailed description. Just download it, click on the icon to launch it, it will immediately display the Windows serial number found in the main window. Download the ProduKey software (the download link is at the bottom of the web page)

Download Linux. It is recommended that you download the system from authenticated sites. Why is authentication important? When downloading installation media from different sources, you may have downloaded a non-original ISO image. Such installers may contain malicious codes or programs that are subsequently added to the system and pose a security risk. The official Linux site is Linux Mint Developers Download Linux Version.

Warning: The regen.hu site is primarily have Microsoft Windows system descriptions, and not other systems, so Linux descriptions are not included, so the description of the Windows / Linux installation in Dual Mode is not available on this site. Other websites have more detailed descriptions and information. Use Google for search!

Secondly, you need the ISO Windows image. Download the program Windows-ISO-Downloader.exe 07.12.2019 Version: 8.24 (Size: 6.2 Mb), to download from the Microsoft site the latest Windows system.

Quick Tip: If you already have a USB flash drive (or USB drive) that already includes Windows 10, scroll down, you can skip this section:

If you do not have a Windows ISO system, do the following:

1.) Left-click the downloaded Windows-ISO-Downloader.exe program icon. In the menu on the right side of the program, select the downloadable system by clicking the radio button in front of the system.

Windows-ISO-Downloader program

3.) A drop-down menu will appear. Click the down arrow with the left mouse button and select the Windows version you want to install in the drop-down window. Click the blue Confirm button. Another menu appears where you can select the language. In this case the English language.

Select the version of Windows you want to download

2.) Click the Windows 64-bit version of the new window. Click the Save button in the download window and save the ISO file to a location that is easily accessible, because with Rufus software we will write to a bootable USB drive immediately.

Click on the Windows 64-bit version

Save it to your desktop using the file manager window that appears, because with Rufus software it will immediately be written to a flashdrive or USB drive of at least 8 GB.

Quick Tip: Save it to another partition or drive where you can easily re-access it later.

Create boot system

Connect to an empty USB port, a USB device of at least 8 GB flashdrive (4 GB is not enough).

Connect a USB device to an empty USB port

Download the program Rufus.exe 30.11.2019 version: Rufus 3.8 (1.1 MB). It's a small program, but it's smart. Can be used without installation.

  1. Start the Rufus program to write the downloaded ISO file to the USB device, which will be automatically recognized and listed at the top, under Device Properties.
  2. Click the SELECT button in the main window and in the file manager (file explorer), locate the Windows ISO file. In the file manager window, click Open, on the right side, below. The Rufus program loads the ISO file. Select the settings as follows:
  3. In the Image Properties, select Standard Windows installation from the drop-down menu.
  4. In the Partition scheme, select GPT from the drop-down menu, then, to the right in the Target system, select UEFI (not CSM).
  5. Under Format Options you can leave the Volume Label Name set by the program.
  6. Under File system, change FAT32 by default to NTFS.
  7. Finally, click the START button

It completes the Windows system, in 4-5 minutes ready to start

Creating an installation system with Rufus

Disconnecting non-essential devices

Connected peripherals are usually the main cause of installation problems. If the connected device is not essential to your device, it is recommended that you remove and disconnect it from the USB port, including other USB and Bluetooth devices, as well as printers, scanners, cameras and more. For a clean install of Windows 10, all you need is a monitor, keyboard, mouse and internet connection (which can also be neglected). After installation, you can reconnect your devices. Windows will automatically detect the connected device and download the latest driver if there is an Internet connection.

Configure the BIOS for installation

If possible, print this section because Bios configuration will prompt you to restart your computer and this manual will not be available. Or open the webpage on your smartphone, tablet, or other laptop or computer you have.

To start the installation, you must start the device with a USB, which assumes that you have already downloaded the ISO file as described above and have written to a USB device using the Rufus program, which contains the clean Windows 10 installation files, but it is only possible if the basic input / output system (BIOS) or unified extensible firmware interface (UEFI) on the system board is configured to boot from USB.

Access BIOS for USB boot

The motherboard BIOS on newer computers automatically detects the bootable system on any USB device and launches the installer without intervention. However, especially with older computers, you must enable USB recognition in the BIOS. If it does not start automatically and the device uses the old BIOS firmware, you can change the boot sequence by following these steps. Do the following:

Quick Tip: The steps for accessing the BIOS vary depending on the manufacturer and even the computer model. As a result, you may need to search for specific details on the manufacturer's support site or, at the bottom left of the screen, when you turn on your computer, indicate which key to press continuously until the BIOS window appears.

1.) Turn on or restart your computer.

2.) After turning on the computer, press and hold the (usually) F2 or DEL keys on the keyboard.

3.) In the BIOS window, look for the sequence Boot.

In the BIOS window, look for the Boot sequence

4.) Set the boot command so that your computer starts from USB with the Windows 10 installation files. The image above shows an older Phoenix BIOS window, but the configuration is similar for the Windows BIOS. based on new computers.

Set the start command

5.) Press F10 on the keyboard to save the new setting. Click YES (Yes) (or OK) when prompted to save.

Press F10 to save the new setting

Quick Tip: For older BIOS, press y (yes) or n (no) on the keyboard when prompted.

After you have taken the right steps, your computer must be able to boot from USB. Please note: If you want to install UEFI, and have created a UEFI USB installation system with Rufus, the program warned you to disable Secure Boot in Bios before installation. Since the stages of access to the BIOS vary depending on the manufacturer and even the model of the computer, it is difficult to describe exactly how to access this option. The image below shows the option available in the Assus Bios menu, but other Bios look the same, with a slight difference. If no such option is available, UEFI installation is NOT supported on that computer.

the program warned you to turn on Secure Boot in Bios before installation

Quick tip: The main failure of the UEFI installation is if you do not delete the old MBR partition (Main Boot Record). More details can be found here …

Windows 10 system – Dual Boot

The installation process for each of these two systems consists of two parts, each separately. First of all, you must complete the installation process, which allows you to delete the partitions, which ensures its cleanliness, which removes any spyware, viruses, configure partitions and install a clean copy of Windows 10. The second part is the OOBE (out-of-box) process, which allows you to configure your personal settings, language, account, privacy, and more.


After you have done a lot of preparation, from the recommended preparation steps to backing up data and creating a USB bootable media, you can continue with the next step, completing the clean installation of Windows 10.

Quick tip: Note: This is a reminder that it will be deleted all data on the partition on the computer where the system is installed. A suggestion: If you have not saved your important data, proceed now, and then start the installation.

Finally, a very good idea: Open the Tools and Drivers window by clicking on This PC (MyComputer). Write the number and size, in Go, of the units, on a piece of paper to properly select the units during installation, when they will be deleted, and when to choose the unit you are installing. The wrong choice can lead to unpleasant data loss. For example: C:/=121 GB and the other D:/=119 GB.

write down their number and size on a piece of paper

Quick tip: If there is only one drive: just C:/, you do not have to write it, because it will be deleted anyway.

To install Windows in Dual Boot Mode, do the following:

1.) Start or restart your computer with the Windows 10 USB storage drive, which was created using Rufus software, as described above. If the BIOS settings are set up correctly and your computer starts from the USB device, the following window will ask you to press any key on the keyboard to get started. Warning: Just press any button now. At restart DON'T press again, even if prompted, because the installation will restart!

restart your computer with the USB storage drive

2.) If the language, currency, and keyboard settings in the "Windows Install" window are correct, click the Next button.

language, currency and keyboard configuration

3.) In the next window, click Install Now

In the next window, click Install Now

4.) Enter the Windows 10 Product Key using the keyboard, and then click Next

Enter the Windows 10 Product Key

5.) To continue, select the I accept the license terms check box, and click Next

select the I accept the license terms check box

6.) In the next window, click Custom: Install Windows only (advanced).

click Custom: Install Windows only

7.) If you have written the size of the unit, according to the good advice above, now take the paper to identify the unit you want to delete, which in this example is C:/ 121 GB. Also delete the smaller associated units because they will be created automatically again.

8.) Click the drive you want to delete, and then click Delete button below. Then click on the next drive and then Delete. Do all the same. See how the deletion occurs as the partitions merge. The size increases.

Do not delete the drive on which the data is stored

Quick tip: The unit on which the data is stored DO NOT delete, because all data will be lost. In this case, you will see three parties in this window.

9.) After deletion, only two "raw" units, ie unformatted, remain. One D:/=119 GB, and one C:/=121 GB. Important: Each unit must be formatted after deletion!

after deletion, only two units remain

10.) To finish, click the drive where you want to install the system, then click the New link below.

Click the drive to finish

11.) The system automatically calculates the size. In this example, do NOT resize, just click Apply.

click Next and format it as before

Quick tip: 121 Gb can be further divided (for example, into two partitions). In this case, you can change the given system number, but only to a smaller number (for example, half: 61,234, do not use 0), which is another unit approx. 60 GB. Format it by clicking the Format link below. Click the other drive to finish, then click the New link below. Here, however, in this window, do not change the size of the system at all, simply click Next and format it as before.

That is why it was necessary to click on the New link (as described above), because this procedure automatically creates the smaller backup and recovery partitions.

12.) Click on the Unalocated Drive (unformatted), then click on the Format link below, finally, when formatting is complete click Next. Warning: Only this unit will be formatted. Formatting other units smaller or larger is STRICTLY PROHIBITED!

Formatting other units smaller or larger is STRICTLY PROHIBITED

13.) Ready. The actual installation of Windows 10 will start automatically. Patience. At the end of the list, at the Finishing up section, the system will restart.

Quick tip: Warning: After restarting, pressing the key on the keyboard IS PROHIBITED, even if you are prompted because it will restart the installation! It is a good idea to remove the USB drive immediately after the computer stopps. Next we do not need.

at the Completion section, the system will restart

14.) After starting, the first window in which you configure the installed files appears. It only takes 3-4 minutes.

first window in which you configure the installed files appears

15.) Set the keyboard in the next window. If correct, click Yes.

Set the keyboard in the next window

16.) If you use a different keyboard, you can choose here. If not, click the Skip button (ie NO).

different keyboard, you can choose here

17.) Configuration of the installation done so far.

Configuration of the installation

18.) Click Set up for personal use to select it. Then click Next. (Setup for an organization (Set up for an organization) means joining a domain based on Windows server, which is rarely configured even on corporate machines).

Set up for personal use

19.) If you have a Microsoft account, enter your email address and enter your password in the next window. In this installation example, we are not logging in, so please click the Offline account link, and then click Next

Quick tip: To complete the seamless installation, NO login in to your Microsoft account now. You can login after installation.

Enter your email address and enter your password

20.) In this window, click the down arrow to select a question, then enter the answer in the bar below (make sure you don't forget). Repeat and click Next.

Click the down arrow to select a question

21.) Click Yes to display additional information windows.

additional information windows.

22.) You will see 5-6 windows where you can select, approve or disable Microsoft activities, such as Location Service, Device Tracking, Diagnostic data submission, typing or displaying ads. Read carefully and click to select all windows, then click Accept.

approves or disables Microsoft activities

23.) It completes in the background the tasks installed so far. Patience.

It completes in the background the installation

24.) Ready. Installation is complete. Launch the Desktop and browser window where you can read more information and tips. Click the red close button on the top, right.

Installation is complete

An important step after installation

Display the This PC (MyComputer) icon on your Desktop

1.) Right-click on a free desktop space and select Personalize.

Right-click on a free desktop space and select Personalize

2.) In the Settings window that appears, click the Themes link in the left bar.

click the Themes link in the left bar

3.) In the new window, under Related Settings, click the Desktop icon settings.

click the Desktop icon settings

4.) In the next system window, select the Computer and User Files boxes on the top left and click the Apply button in the bottom right of the window, then OK.

Select the Computer check box

Ready. Icons appear on your desktop, by clicking on This PC (MyComputer), you can easily access the most important items. Drivers, file manager, control panel, etc.

Internet Service and Update

Click the Internet Connection icon on the Taskbar on the bottom right to connect to the Internet via cable or Wi-Fi (if not automatically connected). In the case of a successful connection, start the update service with Settings (Settings), so that the system can download the latest updates and latest drivers over the Internet, as below..

Install updates

To install the latest security and maintenance updates for Windows 10, follow these steps: Open Settings.

1.) Click the Start button in the Taskbar on the bottom left.

Click the Start button

2.) Click Settings (Wheel icon) in the sidebar that appears.

Click Settings

3.) Click Update & Security below.

Click Update & Security

4.) In the Windows Update window, click the Check for Updates button. Finally, if you found an update, driver, and downloaded or installed it, restart your computer.

Click the Check for Updates button

Then finish installing the updates you started. After restarting the Desktop appears, open the update service again and perform another search. If you found any updates again, continue as described in the section above. Finally, we get a completely new Windows system, which is completely clean. No viruses, spyware and it is much faster and more secure after installing new updates.

Check the Windows system activation

1.) Open the Settings. Click the Start button in the Taskbar on the bottom left.

Click the Start button

2.) Click Settings (Wheel icon) in the sidebar that appears.

Click Settings

3.) Click Update & Security below.

Click Update & Security

4.) On the left, below, click the Activation link.

Click the Activate link

If Windows 10 is enabled automatically successfully (requires internet connection), you may see one of the following messages:

1.) Windows has been activated with a digital license (which means it has been activated, but the license is not linked to a Microsoft account).

2.) Windows has been activated (means your license is activated and your Microsoft account is linked.

The installed system is activated

Quick Tip: If Windows 10 has not been activated automatically, the device will try again in a short time. If the problem persists, you can use the error reporting option.

Check for missing drivers

As described below, you can verify that Windows 10 and Update Service have configured all components, drivers, and peripherals:

1.) Right-click the This PC (MyComputer) icon on the Desktop and click the Properties link at the bottom of the menu.

Right-click the This PC icon

2.) In the window that appears, click Device Manager on the top left to open the application.

Click Device Manager

3.) In the next window, make sure that none of the devices have a yellow question mark.

If one or more devices have this signal, you must download and install the latest drivers from the computer manufacturer's support site (or elsewhere).

Make sure none of the devices have a question mark

4.) Click the yellow question mark with the left mouse button and click the Drivers button in the top menu bar, then the Driver Update button from the new window.

Quick Tip: Download the Driver Booster program from the Iobit website, which installs all the drivers on your device quickly and free after installation. This eliminates the need for the above description. Download Driver Booster »»

OneDrive data recovery

Near the clock, on the Taskbar on the bottom right, bottom corner, by clicking the cloud icon, data is now available in the OneDrive folder (of course if you used the save as described above), where you can easily restore all data.

Secondary system installation

When you are done with the first installation of Windows, you can install the following one, but note that only a newer version of Windows can be installed (or install Linux).

Attention: The second system will be installed on the second unit NOT ON THE SAME UNIT with the first system, because everything will be overwritten by the new installation, so the Dual Boot window will not displayed after the system start, because there will be no second system from which to start the computer.


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