Hi
I am about to explode

I have had Trojan.Winfixer on my machine for a few days, and have tried: Avastantivirus, Spywaredoctor, Vundofix, SuperAntiSpyware, all to no avail. I have still got it, and I also cannot change my desktop wallpaper, or even see my desktop wallpaper!!! When I go to the "Display" on my Control Panel, the "browse" buttons are blanked out, so I cant use them!! HELP!!! i AM COMING CLOSE TO LAUNCHING MY LAPTOP OFF THE NEAREST TALL BUILDING, FOLLOWED BY MYSELF!!!! Is the Trojan Winfixer a particulaly nasty virus????
Please explain things s-l-o-w-l-y to me, as I am an absolute beginner!
Yours hopefully
Judith