I've been using Avast! Antivirus for the past 4 months! It's good. I can't deny that. But in spite of that the problem still persists!

An interesting feature is that sometime in the middle of this mess, my floppy drive was ok and my Writer behaved exactly like the floppy did!

The tray came out and closed on its own accord exactly 30 seconds apart! Then again, the problem shifted to my floppy drive. The floppy is making such a noise that my dad couldn't work on the comp for more than half an hour!

I've installed Ad-Aware SE Personal and run it on my machine. It found many malware and Data miners, but the problem still persists. How can remove this worm or virus or Trojan or whatever it is?