Reformat it will be like a new machine
I have the luxory of having a nice up to date ghosted image of my computer so I have been reformatting my PC like every 2 months!lol..its cool cause with the ghosted image it takes like 15 minutes and I am back to a fresh start with all my programs already loaded for me..so in 15 minutes I am ready to play on a brand new machine! I have a bunch of items pre-loaded (Microsoft office, antivirus, spyware tools, movie editing software, a few games I always play etc etc).
I will update my image about every 4 months with the latest updates to all the software I have. So I basically load my ghost image, update all the software then create the new image. It is very effecient.