Edit: Win XP SP3, running Avast, SuperAntiSpyware, ZoneAlarm Firewall (all free)
For the second time in a week, Avast has found a trojan horse on my backup drive (E:), in a pagefile.sys file that supposedly resides in a subfolder (containing pictures from my camera). Neither time could I find the pagefile.sys file using file explorer, even with it set to show all system and other files. Both times, I have selected “move to chest” after detection. The first time, the name of the virus started with the “Win32:delf” but ended with a different set of 3 capital letters. Both times, after putting it in the chest, then re-running the scan, it did not show up again that day. So, I am wondering if there is another file on the C:\ drive that checks for the E:\ drive file every few days, and rewrites the virus if it isn’t there.
Thing is, I went ahead and downloaded Avira AntiVir Personal and that found nothing. I also ran AVG (which required that I uninstall Avast - will convert back once this stuff is taken care of) on the E:\ drive and it found nothing. Currently running it on the C:\ drive. Nothing yet after 400K+ files and 1h45mins.
I’ve also run Malwarebytes with no detections found and SuperAntiSpyware with nothing similar found.
So, if neither AVG nor Avira finds the virus, can I assume it is a FP? I have attached the screen shot from the second detection.