im having the same problem actually, i got the downloads to continue now though, its stable and doesnt kick the connection. I ran a virus check and found nothing, my browsing speeds are awesome, but its like im throttled and I still have 2.5 gigs left o_0???
to get the downloads to stop disconnecting I removed some programs that looked abit malicious and it started working again. I think an undetectd virus got embedded into one of the files - but i dont think tha could have happened cos i run virsu cheks daily AND its always uptodate. anyway, if i manage to get mine sorted i will help you out too