windows licence key - how to check if it's unused

[#1]

There's fixes for that, but I'm not saying what cos it's very not official...

[#2]

yeah you can just change the wga key registry entry from 0 to 1 in safe mode and it will "fix" the nag's
also since its vista you can delete the WGA update and block it via the registry ....... but I cant remember the exact details so you would have to google for it if you want the "how to", just don't use anything that offers a download to do it as often it will install something nasty into your registry ....