Most apps and devices that work with Windows 10 should work as expected under Windows 11. The new operating system is sufficiently similar to its predecessor that the differences shouldn't pose a problem for most apps. The best way to check compatibility for a Windows app is to install Windows 11 in a virtual machine and try running it. (If you encounter an error, be sure to use the Feedback Hub app to file a report.)If you discover a compatibility issue with hardware or software after upgrading to Windows 11, you have 10 days to roll that upgrade back to the previous installation of Windows 10. That option disappears after 10 days, so don't delay.