Windows 11 install error: Windows cannot be installed to this disk

This is a common issue when you are trying to upgrade Windows 10 to Windows 11 on an old PC. You need to convert MBR disk to GPT in order to fix "Windows cannot be installed to this disk." error when installing Windows 11 from USB. This can be done with the help of Veentoy tool.

Veentoy is a minimalist interface, intuitive operation of the green installation-free software, fast startup, just a few minutes to create a UEFI boot USB flash drive, copying the ISO file without complex configuration, novice can easily get started, and support for multi-ISO files. Although it can not directly repair the disk partition, but as an installation media creation tool, it can effectively solve media-related problems.

1. Run Veentoy2Disk.exe as administrator, select a USB flash drive with at least 8GB, select UEFI mode and click 'Install'.

2. Visit the Microsoft website and download the Windows 11 ISO file and copy it to the root directory of the USB flash drive where Veentoy is installed.

3. Insert the USB flash drive and restart your computer, enter BIOS to set the USB flash drive as the preferred boot item, enable UEFI and Secure Boot, select Windows 11 ISO in the Veentoy menu, and follow the wizard to complete the installation.

Once it is done, the error message "Windows cannot be installed to this disk." will not show up and you can now install Windows 11 on unsupported PC without any issue.