Just a thought, If you are use MS FW disable allow exections. Everyone that install software think the they need free relm, In reality they only needed it when you want them to have it. Dump it for Comodo FW, and use a hardware firewall (router). More layers the better.
Do a full virus scan, spyware, addware, and root scan.
As a rule if you havn't all ready add a admin password. This is over looked by most.