I've had a a virus detection in a3-free and AVG, and I'm slightly concerned about it. I'd appreciate some advice from someone a bit more adept with computers than myself
The virus is detected in A3 as "Exploit.Win32.MS04!k" and is on six files in the temp folder, eg: C:\Users\A---\Appdata|Local\Temp\~PI1187.tmp. All the files have a similar name, starting with "~PI". In AVG, I just get a message that the same six files "May be infected by unknown virus Exploit.JPEG". There's no other information than that in AVG.
Malwarebytes, Ad-aware and Avira Antivir all show the files as clean. I did a jotti.org scan and about half the scanners show the files as infected.
After googling I found that the MS04 virus sometimes shows on images that have been resized by the user. Also, the "PI" extension seems to be some kind of high-quality or encrypted image format. In my case, I'm assuming these are temp files left/created after I resized or edited some images (though I've never knowingly used or downloaded files in the format).
I've scanned all the .jpg images on the PC and my portable HD, and AVG/A3 shows them as clean. I've also submitted the files for analysis to ikarus and grisoft, but this can take days or weeks. I'm using Vista 32-bit on a Dell laptop.
I don't have any recurring virus issues at this point, the files have been sucessfully quarantined and I rescanned my PC - it's showing as clean now across the board. I don't seem to need any technical help at this point - however, it would be great if someone could confirm this as a false positive, or if this is a real virus issue. I'm concerned that it will reoccur until I identify the source of the virus, or at least find out what risky action I took to get it on my PC.
Thanks for your help.