best thing i would suggest would be to uninstall the programs you dont want, then download this program,
tweaknow regcleaner std (free) it will clear registry of unused and dead registry files from programs uninstalled for freeeeee
goto
www.download.com and search for it there
Then go to program files in c drive and delete old folders of programs just deleted, not much space hoggin buit i just like to get rid of em personally!