On a machine showing no symptoms, Avast Free 6.0.1125 (defs 110519-1) flagged as Win32:KillAV-AHY [Rtk] and quarantined a file in c:\Windows\System32\wdi\ with a very long name consisting of letters, numbers, and symbols, ending in _UserData.bin.
Alarmed, I ran a full Hitman Pro scan, a Malwarebytes scan, a Norton Power Eraser scan, and a Kaspersky TDSSKiller scan, all clean.
I then ran an Avast boot scan, and it flagged four more files as infected with Win32:KillAV-AHY [Rtk]. Three of these were the System hive of ERUNT registry backups – all of them are old files. I uploaded one of them to VirusTotal and only Avast flagged it: http://www.virustotal.com/file-scan/report.html?id=9963449e9d511f2baea647473a167f9f243673067a22b98346b7f9cc74a8e24e-1305831723. (They are all very large and VT seems to be having a problem with the large sizes, or I would test them all.)
I see that others are having potential Win32:KillAV-AHY [Rtk] false positives today: http://forum.avast.com/index.php?topic=78403.0 , so I have submitted the original file, currently in the Virus Chest, as a potential false positive. The others are not yet in the chest as I told the Boot Scan to report but not quarantine.
Is there anything else I need to do to help you investigate this?
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