Hello. I have a Dell T430 server, it's running Windows 2012 R2 (factory installed). It was fine for a long time, but recently I'm getting a wartermark on the lower right of the screen that says Windows is not activated. When I try to activate it in the control panel, it produces a pop up asking for a key. I entered the key from the Windows sticker on the computer, but I got a message saying it does't work. I also tried retrieving the key from the registry with the magic jelly bean program. It gives a different key, but that one doesn't work either. I am also having a problem with Windows updates. It seems like every update fails to install, and then has to be rolled back. This is a production server, so I definitely want updates on there. Does anyone have any idea how to address this activation issue? I ran the system file checker, and it did not find any integrity violations.