ANOTHER WAY TO 'DOWNGRADE' / 'ROLLBACK' / REVERT TO WINDOWS 10
The option to revert back to Windows 10 expires 10 days after installation of Windows 11.
However, there is a way to extend the option to 60 days. See
https://windowsreport.com/rollback-windows-11/
Alternatively, create a full backup and system image prior to installation of Windows 11 & save to a portable hard drive. Or, if you didn't do that prior to installation of Windows 11, use Windows 'Backup & Restore' to create a system image soon after installation of Windows 11, BEFORE the 10 day option to 'Go back' to your previous version of Windows expires.
Useful if you forgot to do this immediately prior to installation of Windows 11.
I managed to roll back to Windows 10 and my computer is now back to working as it should. I was able to restore the computer to Windows 10 and restore all personal stuff because I had backed up and created and saved a System Image (using ‘Backup & Restore (Windows 7)’). Unfortunately, I had deleted the backup and system image that I had done a few months prior to Installation of Windows 11 (I forgot to do one immediately prior to installation).
I had created a backup and system image shortly after installation of Windows 11. That is what I used to restore the computer to the state it was in at the time the backup and system image were created. However, because I had created the backup and system image two days after installation of Windows 11, when the restoration was complete I was still with Windows 11.
The good news was that because it was a restoration back to just a couple of days after I had installed Windows 11, the option to ‘Go back’ to using Windows 10 was there for me to choose. In effect, the restoration had placed me back in the ten day Windows 11 trial period, even though 17 days had passed since installation, so the option to revert to my previous version of Windows (Windows 10) was still there.
If ever you do have to do this yourself, note that all the personal preferences you had made for your system and Microsoft applications will need to be redone.
I strongly advise that you ignore the prompts to switch to Windows 11 until nearer the time when support for Windows 10 is discontinued. By then, Microsoft should have fixed most incompatibility issues. 😉
On the twelfth day after installing Windows 11, my system slowed right down. Starting the computer, loading my desktop, using Windows explorer, opening a web browser and switching between tabs, and starting Office 2021 applications, had all slowed right down, with a massive lag between command and response, making my PC pretty useless.
Do remember that Microsoft support for Windows 10 WILL CONTINUE until 14th October, 2025.
See:
https://answers.microsoft.com/en-us/windows/forum/all/downgrade-from-windows-11-to-windows-10/84a2416d-ccfb-4d87-9eee-e1056591e91f