One point - on the basis that you seem to have acquired the same problem across two builds of windows, my first thought was that you had either a bad driver or a bad stick of ram.
If as seems probable, you have picked up the same bit of spyware twice, it seems reasonable to suppose you have been to a dodgy website twice or have holes in your anti virus.
Not finger pointing, but perhaps a little food for thought - maybe stay away from Ukraninan-mp3downloads.com!