Hi, im having problems with ebay, i can access random pages through links, but if i try to sign in i get http 400 bad request. This happened shortly after upgrading th ie8.

Ive tried:
unistalling ie8, uninstalling all security and replacing with new, going back to a fixed point, removing crap off my pc, deleting history and settings, running scans, resetting my modem, downloading a fix it from microsoft, making sure http settings are enabled, removing my browser and downloading a new one, making sure pop ups are allowed, downgrading security levels, opening a new ebay account and more i cant remember. Its quite important i fix this as my income is from selling on ebay! Ive resorted to using my wii, but i cant download pics on there and its takes alot longer. Please some clever soul, help me!!