Although it is easy (and, to some extent, satisfying) to reflexively blame Giga for anything that goes wrong on one's computer... anyone who is going crazy because his/her computer has been crashing or generating odd error messages should first do the following, to try to accurately pinpoint the misbehaving application or Windows service:
Go to Windows Control Panel > Administrative Tools.
Double-click "Event Viewer."
Double-click first "Application Log" and then "System Log" and, in each one, check for any recent errors -- these are the ones marked with a big red X.
Right-click each such error and select "Properties."
Hopefully you will see enough information there to give you an idea what went wrong with your system, and which application or service is responsible... or at least enough info to post here to solicit useful solutions, without provoking the simple-yet-nonproductive pleasure of group Giga-bashing...
Good luck in any case!!