I had Grisoft AVG on my computer. Somehow a worm entered my computer and even though it was identified, the message said that it could not be removed. My son deleted the Grisoft from my computer and was going to install Norton Antivirus, but since I already have a worm it, it cannot be installed until the worm is removed. I do not remember the name of the worm, but it seems like it was "I Worm" or something like that. I did a system restore and it would let me restore only back to the point after the worm entered....it wouldn't let me restore prior to the infection. My question is this....since I no longer have Grisoft to run a scan and tell me the name of the worm and I can't download Norton until I get rid of the worm.....what do I do? I do know this much, it is in my documents and settings and the results of the Grisoft scan said some files could not be opened and others had a warning that said "hidden extension". I copied the information from that scan to my received documents file and still have that information, but I don't understand it. Can anyone help?!