[sadu]

Keep the firewall on...I don't use XP but you have to allow your Bit Torrrent in/outs. The other things should remain firewalled.

This happened to me once when my C: which wasn't even the drive I was saving to was almost full. I cleaned out C: and my download speeds picked up. Your computer may just be a little messed right now.

Spyware scan?
Virus Scan?

What are your speeds when downloading HTTP? or FTP?

good luck