Possible trojan, stealing internet?

Hey everyone,

I am having trouble with my computer. Every time I run Firefox, everyone else's internet connection on the same network, including mine, incredibly slows down. We have done speed tests, and whenever I shut down my computer the internet instantly speeds back up. I use uTorrent, and I looked at my msconfig startup files and saw only one unrecognized file: ali.exe. I went to the location of the file and deleted it, and it hasn't reappeared since, however the problem with the internet still persists. What could the problem be? HJT log is attached.