I've also found a reasonably priced and good computer repair guy in my neighborhood. Saved me from buying a new computer!
At this point I would suggest a good Anti-virus program and keep it updated. Also there is a free site...
http://malwarebytes.org/
that you can download and it searches for malware and spyware that can also slow your computer down, cause pop ups and search your computer for information!
Good luck!