[FONT=&]Windows has a habit of alerting you to problems. This being the activation screen, I’d guess you have an activation problem. Or something that Windows sees as not quite right.[/FONT] [FONT=&]Are you your own administrator? In other words is this your personal system or is this a business system? [/FONT] Here’s the thing. Back when it was an update issue I and others were trying to convince you to just not worry about it. Now we understand the real problem is not an innocuous update issue but an activation issue. With the exception of a single installation of Windows 7 using Daz loader, activation to me means buy a license. If you've activated by any means other than with a purchased license, better minds than mine will have to advise you.
Did you run a system file check? (run sfc /scannow on an elevated cmd) Run slmgr /dlv and check the info Check the "startup" section in taskmanager