Generally, i access my internet without using any proxy servers ie my firefox/IE always has this option unchecked. Then i ran ultra surf this one time (on vista x64) and it worked fine but then once i closed ultra surf i couldn't connect in either browser, inspite of having my original browser settings, wherein no proxy server option was selected.
So currently, i can connect only by using ultra surf and not without it, which's consequently affecting my speed esp for torrents.
I'm certain its not an issue with the settings in my browser, because my torrent client is behaving similarly ( works only when ultrasurf's on ) so if u can point out to something else, i could try that out.
Also, can't be a router issue as it works fine on my other OS.
I generally dont have good luck with forums but hoping u guys can help me out, till then ultrasurf it is.