I have a problem with Windows 11. I got a new computer and for some reason it has my husband as administrator, same as the old computer. He had a Microsoft acct. My husband passed away in 2020. I can't use or do much of anything with Microsoft as I can't sign into Microsoft. I found a site that told me how to delete an administrator and make myself the administrator but that was for Windows 10...last step wouldn't work on Windows 11.
Any advice . Is there any way I can call Microsoft?

HP PC Windows 11 Firefox browser