Lownload 'AdAware' from Lavasoft, it's free and it'll scan your HD for little nasties that can slow things down... it's not an anti-virus thing, but it'll usually find a lot of crap... good luck
try .... http://www.ccleaner.com/ CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. But the best part is that it's fast (normally taking less than a second to run) and contains NO Spyware or Adware!
Delete all cookies and temporary files. Then restart in Safe Mode,run Spybot ,Ad-Aware,and MRU Blaster. Delete everything they find. Then run Defrag.
CCcleaner AKA Crap Cleaner works great, cleans up cookies, adware, your search and a bunch of other stuff, and like he said there is no adware or other crap that loads with it
1 800 geeks, worked for me today. Couldn't hurt to unplug modem power and router power for a few minutes and then restart.