Vista seems to have stunted my downstream

[Techpro77]

I first began using utorrent with win XP, speeds (both up and down) were very satisfactory. Recently I performed a clean install of Vista Ultimate x86, now suddenly my torrents crawl down to me. I've tried the Vista TCP/IP Patch, adjusting setting according to the speed problems Forum, but have not been able to produce noticable results. I am crawling out of my skin here people, I can't deal with slow. Anything you can offer to aid my return to a copecetic state will be greatly appreciated.