First of all, try scanning with Ad-aware and the VX2 plugin too:
In case you haven't scanned with Avast, you can do this too.
If the error is still there after the 2 scans, the only i can think of is this, but i have my doubts with it. I thought that if your Winsock files were corrupted you would have no Internet connection at all.
Anyway it makes back-ups so you could try it...