Sometimes Murphy´s law just happens...
Forgot to active Windows Vista and you have three days left and you have misplaced your installation key? The guys at Microsoft themselves give us an easy solution to this problem:
First make sure to switch of any active background anti-virus software and/or registry guard software.
Open the Windows Menu and enter "cmd" into the search field. Then do a right mouse-click on "cmd" and choose "run as Administrator". Confirm the "Nag Screen" should it come up, and at the promt enter: slmgr.vbs -rearm.
Press enter and nothing happens for quite a while. Finally you get a message telling you that your changes won´t take effect until the next reboot. Close everything and reboot. Voilá! You have 30 additional days until activation becomes nessecary. You can do this 3 times.
