To be sure, you can test your machine with anti-rootkit applications. I suggest AVG, Panda and/or F-Secure BlackLight.
Also, if you still detecting strange behaviors, scan and submit to on-line analysis the RunScanner log would help to identify the problem and the solution.
After you’re clean, use the immunization of SpywareBlaster or, which is better, the Windows Advanced Care features of spyware/adware cleaning and removal.
Finally, when you’re clean, check for insecure applications with Secunia Software Inspector to update insecure applications and avoid reinfection.
