You know something? Those suspicious files are all gone. I couldn't ran an AVG scan but I still wanted to try to go thru other of your instructions, so I ran ATF cleaner in safe mode, and after that they were gone. Is it possible?
Anyway, thanks a lot for your patience. I'll probably be back when I run into another problem
Still, I have one more question. Which anti-virus program would you recommend? I have McAfee installed plus Spybot-Search&Destroy and Ad-Aware SE Personal. Should I install something else?