I'm sure there are others, but this a great tool for working on viruses: http://www.virustotal.com/

Right now I'm combating a virus and wasn't sure what it was. When the system would boot it would give error messages pertaining to a couple of system files. I replaced the files form the command prompt, and upon first boot would be fine. Then on the second boot it would throw up the errors again. I upped one of the files to this website and it kicked out this report:

Antivirus Version Last Update Result
a-squared 4.5.0.18 2009.06.18 -
AhnLab-V3 5.0.0.2 2009.06.18 Win32/Virut.F
AntiVir 7.9.0.191 2009.06.18 W32/Virut.Gen
Antiy-AVL 2.0.3.1 2009.06.18 -
Authentium 5.1.2.4 2009.06.18 W32/Virut.AI!Generic
Avast 4.8.1335.0 2009.06.17 Win32:Vitro
AVG 8.5.0.339 2009.06.18 Win32/Virut
BitDefender 7.2 2009.06.18 Win32.Virtob.Gen.12
CAT-QuickHeal 10.00 2009.06.18 W32.Virut.G
ClamAV 0.94.1 2009.06.18 -
Comodo 1363 2009.06.18 -
DrWeb 5.0.0.12182 2009.06.18 Win32.Virut.56
eSafe 7.0.17.0 2009.06.18 -
eTrust-Vet 31.6.6567 2009.06.18 Win32/Virut.17408
F-Prot 4.4.4.56 2009.06.17 W32/Virut.AI!Generic
F-Secure 8.0.14470.0 2009.06.18 Virus.Win32.Virut.ce
Fortinet 3.117.0.0 2009.06.18 W32/Virut.CE
GData 19 2009.06.18 Win32.Virtob.Gen.12
Ikarus T3.1.1.59.0 2009.06.18 -
Jiangmin 11.0.706 2009.06.18 -
K7AntiVirus 7.10.766 2009.06.17 -
Kaspersky 7.0.0.125 2009.06.18 Virus.Win32.Virut.ce
McAfee 5649 2009.06.17 W32/Virut.n.gen
McAfee+Artemis 5649 2009.06.17 W32/Virut.n.gen
McAfee-GW-Edition 6.7.6 2009.06.18 Win32.Virut.Gen
Microsoft 1.4701 2009.06.18 Virus:Win32/Virut.BM
NOD32 4167 2009.06.18 Win32/Virut.NBP
Norman 6.01.09 2009.06.18 W32/Malware
nProtect 2009.1.8.0 2009.06.18 -
Panda 10.0.0.14 2009.06.18 W32/Sality.AO
PCTools 4.4.2.0 2009.06.17 -
Prevx 3.0 2009.06.18 -
Rising 21.34.34.00 2009.06.18 Win32.Virut.bm
Sophos 4.42.0 2009.06.18 W32/Scribble-B
Sunbelt 3.2.1858.2 2009.06.18 Virus.Win32.Virut.ce (v)
Symantec 1.4.4.12 2009.06.18 W32.Virut.CF
TheHacker 6.3.4.3.348 2009.06.17 W32/Virut.gen
TrendMicro 8.950.0.1094 2009.06.18 PE_VIRUX.D
VBA32 3.12.10.7 2009.06.18 Virus.Win32.Virut.X5
ViRobot 2009.6.18.1794 2009.06.18 Win32.Virut.AM
VirusBuster 4.6.5.0 2009.06.18 Win32.Virut.Y.Gen


So now I'm actually able to address the specific problem rather trying to carpet bomb the whole PC. AVG makes a cleaner specifically for this virus BTW.

yes, most decent virus scanner makers have detailed info on individual virus's, so you can take specific action.

but, I find the quickest way has always been to remove the drive, connect it via a USB adapter to another computer, and scan/clean it.
ESPECIALLY with virus's which get into the boot sequence

quote Originally posted by Pyrthian: yes, most decent virus scanner makers have detailed info on individual virus's, so you can take specific action. but, I find the quickest way has always been to remove the drive, connect it via a USB adapter to another computer, and scan/clean it. ESPECIALLY with virus's which get into the boot sequence

Or boot it off a live cd with antvirus tools on it.. much easier then ripping a friends ( or customers ) pc apart

quote Originally posted by User00013170: Or boot it off a live cd with antvirus tools on it.. much easier then ripping a friends ( or customers ) pc apart

yes - a very good option, but a bit complicated for many to create
and, todays screwless cases are fairly simple to pop drives in & out
I did for quite sometime use a a boot CD with f-prot - but it was getting cumbersome, and specialty machines with raid controllers and even some newer SATA drives dont always work very well without drivers - but - again - you can exactly pop out raid drives either and scan them.....

[This message has been edited by Pyrthian (edited 06-18-2009).]

I did all of those things to no avail. I ran a half dozen scanners including AVG, Avast, Avast Rootkit Detector, (all from a miniPE disk) Malwarebytes, plus a few other scanners I downloaded. They all found and deleted tons of files, but it came back every time. They also showed the virus with a different name. It was only after I upped a file to that website did I get an accurate report of the virus name. Ran the AVG scanner, gave it a repair installtio to replace the *many* damaged/missing files, and it's working great right now.