My desktop/start bar went away, and doesnt come back!

alright so i think i have some spyware or something, who knows.

my desktop explorer along with my start menu and the bar went away, its not coming back. i restarted the computer, i logged back in, it still doesnt show up.

my only method of getting around now is using CTRL+ALT+DEL, then running a previous location that used the firefox window. after the firefox window opens, i can navigate around my computer a bit (i got to my program files and then eventually opened up ad-aware, which is now running).

if i try to open up a windows folder, like my documents, the desktop shows up for a second or two then disappears again, along with the folder.

firefox, cmd, and task manager are the only weapons i have at the moment to fight this beyotch. ideas?