I have a virus on my pc and I was wondering if any of the experts on here
could help me out, PLEASE.

It was sent via MSN (well Windows Live Messenger is the new name for it) and
it was a rar file that was called My Photos, then a message that said
something like Have a look at the photos of my workplace)

The worrying thing is that AVG was totally up to date and when it scanned
the incoming file it said no threats found, so my wife extracted the photos
and that is when it went a bit weird and shut each MSN contact window down
and then closed MSN down.

I just thought I would give you the brief details on what or how it got onto
my pc. I might have been stupid but when AVG scanned and said it was OK she
thought it would be OK.

I have managed to run AVG, Ad Aware and Windows Defender (which for some
reason when all these programs found something it moved them to the AVG
Virus Vault) and it has now found all of these trojans and worms.

This is the list from my AVG Virus Vault

Virus Identified Worm/VB.AUG
Trojan horse Backdoor.Ircbot.AK
Trojan Horse Dropper.Delf.EL
Trojan horse Downloader.Istbar.9.AV
Virus Identified Worm /Sumom.C
Trojan horse Downloader.Agent,MLM

I deleted these from he vault and then tried to scan again in safe mode, but
both times the scan crashed.

I then tried to run AVG in normal mode and it found Trojan horse
Downloader.Istbar.9.AV in a couple of files located in C/RECYCLER but it did
not complete the scan as it was still running after 7 hours, but it seemed
as if the pc had frozen, other than letting me move my mouse cursor but not
click on anything.

If anyone can help it would be appreciated.