Most PCs from the past 15 years can run Windows 11. PCs sold with Windows 10 can usually upgrade after a registry edit. On older or unusually configured PCs, a third-party utility might be required.

If you are encountering the 0xC1900101-0x40021 Windows 11 upgrade error, execute the solutions given below. An outdated BIOS is the primary cause of the 0xC1900101 ...

Be careful where you click. “To be absolutely clear, Microsoft is not forcing a Windows 11 upgrade.” But Windows 11 may install anyway, if you accidentally click the wrong option. And if that upgrade ...