I let the OS reach the end of its evaluation period and it's locked me out, requires activation now. That wouldn't be a problem if UAC would let me - if I select any option that requires elevation the UAC prompt waits for my credentials, but won't advance beyond that stage, preventing me from activating it. When I installed it I used local policy to require ctrl+alt+del before entering credentials. Now it's asking me to press control+alt+delete to enter them as usual, but when I do, nothing happens; it just keeps asking me to press the combo, no matter how many times I already have.I apologize if this is a silly question, but it has never happened to me before. Is there any way I can work around this and get this server activated?