What you need to know about windows 11. Before you start to download and install Windows 11. Windows 11 Will Give People 10 Days to Roll Back to Windows 10, once you go pass 10 days, you will not be able to roll back to windows 10. But you can extend rollback period to 60 days before the 10 days have passed.
DISM /Online /Get-OSUninstallWindow
DISM /Online /Set-OSUninstallWindow /Value:60