Run Windows 10 alongside Kubuntu using VirtualBox.

Step 1: Click 'New' to create a new VM.

Step 2: Set VM name, select the Windows 10 ISO, and skip unattended installation.

Step 3: Set 'Base Memory' to at least 4096 MB and set 'Processors' to at least 2.

Step 4: Set 'Disk Size' to 64 GB or more.

Step 5: Review settings and click 'Finish' to create the VM.

Step 6: Click 'Start' to boot the VM and begin installation.

Step 1: Click 'View > Adjust Window Size' to see the entire VM screen.

Step 2: Select language and keyboard preferences, then click 'Next'.

Step 3: Click 'Install now'.

Step 4: Click 'I don't have a product key'. You may activate your chosen edition of Windows later.

Step 5: Select an edition of Windows to install. Home and Pro are the two most common choices.

Step 6: Read and accept the Windows End User License Agreement.

Step 7: Click 'Custom: Install Windows only (advanced)'.

Step 8: Click 'Next' on the partitioning screen to accept the defaults.

Step 9: Wait until the VM automatically restarts. It will reboot twice.

Step 1: Right-click the virtual network adapter and disconnect it to bypass needing a Microsoft account. You can connect the VM to the internet later.

Step 2: Select your country and click 'Yes'.

Step 3: Select your keyboard layout and click 'Yes'.

Step 4: Skip adding a second keyboard layout. You can enable additional layouts later if needed.

Step 5: When prompted to connect to a network, click 'I don't have internet'.

Step 6: Click 'Continue with limited setup'.

Step 7: Choose a username for your local account and click 'Next'.

Step 8: Create and confirm your password, clicking 'Next' when prompted.

Step 9: Choose three security questions and their answers. We recommend using your VM password as the answer to each question.

Step 10: Switch off all privacy-affecting features and click 'Accept'.

Step 11: When prompted to enable Cortana, click 'Not now'.

Step 12: Wait for Windows to finish setup.

Step 13: Verify that the Windows desktop appears as shown. Do not connect to the internet yet.

Step 14: Click 'Devices > Insert Guest Additions CD image...'.

Step 15: Click 'File Manager > This PC', and double-click 'VirtualBox Guest Additions'.

Step 16: Double-click 'VBoxWindowsAdditions'.

Step 17: At the User Account Control prompt, click 'Yes'.

Step 18: In the installation wizard, click 'Next' until you are shown the 'Choose Components' screen.

Step 19: On the 'Choose Components' screen, click 'Install'.

Step 20: Let the installation finish. It is usually very fast.

Step 21: Once installation is finished, click 'I want to manually reboot later', then click 'Finish'.

Step 22: In the search box, type 'regedit' and click 'Registry Editor'.

Step 23: In the User Account Control prompt, click 'Yes'.

Step 24: Navigate to 'HKEY_CURRENT_USER​\SOFTWARE​\Microsoft​\Windows​\CurrentVersion​\Themes​\Personalize', then double-click 'EnableTransparency'.

Step 25: Set the key's value to '0' and click 'OK'.

Step 26: Click 'Start Menu > Power > Shut Down'.

Step 27: In the VirtualBox manager window, ensure the Windows 10 VM is selected, and click 'Settings'.

Step 28: Click 'Display', then check the 'enable 3D Acceleration' box. Increase video memory to 256 MB, then click 'OK'.

Step 29:: Right-click the virtual network adapter and reconnect it. When asked about making your PC discoverable, click 'No'.

Step 30: Install OS updates and reboot.

Step 30: In Settings, find the 'Activation' screen. Click 'Change product key', and enter your product key to activate Windows.