My product key doesn't work help - Microsoft Windows Vista Home Premium with Service Pack 1: Windows

Of course, recheck the nunbers. Zero's being O's and what not.
If still having issues, call the telephone number provided on the licensing screen and Microsoft automated support will process your old number and give you a different authentication to enter.

I’m happy to assist further over the phone at https://www.6ya.com/expert/dan_91204789c5bd4b93