Lop virus?

Hello, i have been using the free avg anti-virus software,and it keep finding and deleting the lop virus.So i did the online norton virus,and it did not find any viruses.i also downloaded pctools virus software and it does not find any
viruses.i like the avg software,but it keep finding bad files named c008D6F2.dat or c00Db440.dat are this system files? what does the lop virus do?

thanks

Normally, lop installs a tool bar in Internet Explorer and generates pop up ads. The tool bar directs you to lots of sponsored and bogus searches. It is very likely to try to install more nasties on your computer. Some virtumondo variants are detected as lop by AVG. I would download and run ComboFix. I really suggest reading the tutorial before you run ComboFix. Let us know how this works for you.

try something other then AVG, I heard but not sure if that fact is true,that AVG is not that great with its protection anymore..

Don't uninstall ANY antivirus while infected or you'll be in a worse condition. Try running the combofix like SL suggested. If you still feel you are infected start the computer in safe mode and try running NOD32s ESET ONLINE SCANNER This will find a good portion of any viral infections that may have been missed by Norton as Norton is shoddy software in my opinion. If AVG did miss something or had an issue chances are the NOD32 scanner will find it.

I have found that alot of times even after antivirus software removes virus, that they will find more copies on subsequent scans in you system restore information. After I clean a system I usually make sure to delete all the restore info.