TigerCat: If you are having that amount of problems, i would advise a complete clean install of Windows
Of course you will need the Install disk that should (hopefully) of come with the computer, or a new one. Of course you will have to back up any important stuff either to DVD or use an on-line storage site ( ADrive will give you up to 50gb of space ).
This is a much better idea when having so many problems. System Restore is only OK if you know you have a good Restore Point.