Ive got a 5 year old HP laptop. It just isnt running well, freezing up, crashing, etc. Its running a bootleg windows 7 that my friend installed when i had him fix it the first time. I would like to wipe out everything on the computer and just start over. Is it as simple as buying a genuine copy of windows and reinstalling? will that wipe everything out including any viruses/spyware that i may have picked up. I was thinking about buying a new laptop but I kinda like this old thing and it does what i need it to do (when its working) so why spend 500 plus on a new laptop when i can spend 100 on windows