If you get this message “I DNT HATE MOZILLA BUT USE IE OR ELSE…” when you try to launch Firefox or this” ORKUT IS BANNED, Orkut is banned you fool`, The administrators didn’t write this program guess who did?? ” when you try to launch Orkut Or “youtube IS BANNED,youtube is banned you fool`, The administrators didn’t write this program guess who did??`r`r MUHAHAHA!!,30“, then your system is infected with w32.USB worm. Don’t panic,since this worm is a decent worm, which does not destroy your files or damage your computer.
This virus spreads through USB drives. It will not let you install Firefox and if it’s already installed 0n your PC, it won’t let you use Firefox!
The virus is known as heap41a W32.USBWorm.
Go here for steps to rid of the virus
Update: Right click and save link as to download the worm remover here
Update : For USB drives, please be sure to delete the autorun.inf file and any folder which ends with .exe in the USB drive, backup your files and format the USB drive to rid it of the worm.