Dont think its malware but............??

Hi all, I've a feeling that my problem is not malware but I'll ask the question anyway.
I'm running win xp on a 3.00gb processor with 1gbram.
I have my main hard drive split into two 80 gb drives C: and D:
In my D: drive I have a folder which is almost totally torrent downloads and it is this folder that has the problem.
When I open the folder a message pops up to say that windows explorer has encounterd a problem and has to close. If I put this pop up to one side I can open files, play vids or do anything with the folder but if I click on the " dont send" or the "send" buttons at the bottom the screen refreshes and the folder closes down. I have scanned the whole pc and also the D:drive specifically with AVG and adaware SE pro. I have also ran these in safe mode but it has made no difference.

Any advice would be gratefuly recieved.

Thanks
Jiroma