Virus Lop Found

Last week, my AVG Resident shield detected a virus called Lop and it was in my Temporary Internet Files folder, and I only Firefox to surf the net. also, the infected file is a dll with a string of five letters. I moved it to the virus vault b/c it could not heal it. Then I deleted the file, cleared my Temporary internet folders. Then I restarted the computer and opened Firefox and maybe like five minutes later, AVG Resident shield detected the virus again, in the same folder. I also noticed that it would be sluggish in starting up after putting in my password to log into the my XP account on the computer. I am really confused what to do next. Anything will be very much appreciated!


Specs: Dell Inspiron 1100
Windows XP Service Pack 2
512 MB RAM
Using Wireless internet 802.11g
Browser: Firefox
AVG Free Edtion
AVG Spyware
Adware

Message Edited by Duchovnysfan on 01-27-2008 07:01 AM