The USE INTERNET EXPLORER U DOPE popup with the text "I DNT HATE MOZILLA BUT USE IE OR ELSE.." is a registry malware named as w32.USBWorm, which could be delete and solved by the Following Process.
Remember : The Virus spread through the USB Pen Drive. So delete any .exe file and the autorun.inf file from the Pen Drive.
= open the Task manager by pressing CTRL+ALT+DEL , go to the Processes Tab
= Sort the image name Column so that you can find multiple svchost.exe, look for the ones which have your username and delete those ones.
= go to Start --> Run and type C:\heap41a --> This is a hidden folder by the virus --> delete all the files under this folder
- Now type Regedit -> press CTRL+F (to Find) and type "heap41a" . On getting the results on the right Panel , Delete it. Repeat the Search twice with CTRL+F.
[ Click "YES" on confirmation to delete]
Close the Registry Editor.
Enjoy Surfing with Firefox. Hurray.