How can I restore my computer?
It depends on your computer.
Dell XP = Ctrl+F11 Dell Vista = F8 EEEPC = Esc Compaq = F11 HP Desktop Vista = F11 Emachine = F10 Acer = Alt+F10
All this is when you start up your computer
Click start-all programs-accessories-system tools then system restor, select the time which you want your computer to restore to. eg. january 23. 2008
Restart you computer and press F10 until the next screen, then follow steps
I would take it to a computer shop.