anti- virus

[wm_hunter]

Maybe because you downloaded them from a site that called them renders when they were viruses... ? Where they in ZIP files?

I never have a problem with any of my renders being detected, I am sure if you check Virus Total or Jottis Malware Scan, many of the antiviruses will detect a virus and there really will be one (those sites scan one file with a bunch of Antiviruses, both including AVG in the list).

AVG is not known for false positives (detect a virus when it's not there), some other antiviruses like NOD32 and Avast get them more often...