I have a Dell XPS 8900 and wonder if i can remove Windows 10 and safely go back to Windows 7 Ultimate? What do I need to do, I have the program and key. Unless you have a VERY VERY good reason, no.
Microsoft has ended the third and final year of Windows 7 Extended Security Updates (ESU) and is urging customers to migrate to Windows 11 on a new PC or buy Windows 10 if they can't or don't want to.