Yahoo runs alot, I mean alot of background programs. Take that off your start up programs. You can still use it, just don't have it automatically start.
Then run a program such as ad-aware by lavasoft or spybot. To eliminate any malware or ad programs that can slow your computer down. Also check what add ons are on your computer by going to tools, then internet options, then programs, then manage add ons in your browser. Click disable for any that you do not use.
After that do a full virus scan. Good Luck.
at 11:20 AM on May. 12, 2009