yea, try system restore first..but most of the time, system restore will not work on this vista problem.worse comes to worse, give Hp a call and ask them how to restore your computer like on a 'factory settings' (usually takes 5-8 minutes).and before you do this, SAVE all your important files first..Do you have another partition on your hd? if you do, save all your files on that partition for the meantime before you perform any changes to your computer..