Hi,
i’m infected (11.20.2008) by troj/iyus-V http://www.sophos.com/security/analyses/viruses-and-spyware/trojiyusv.html
Avast free (last edition and update) can’t detect it so it does not remove
The virus is in Mshelp.exe and create sqla.dll
Msconfig → run → Mshelp.exe
(XP Mediacenter SP3)
How can i remove this Troj ? Thank’s
Welcome to the forums, Eric. 
I would suggest that you download, update, and then run malwarebytes antimalware.
You can get it at this link : http://www.malwarebytes.org/rogueremover.php
Before running any other programs that would delete/quarantine the files.
Send the sample to virus@avast.com zipped and password protected with the password in email body, a link to this topic might help and undetected malware in the subject.
Or you can also add the file to the User Files (File, Add) section of the avast chest (if it isn’t already there) where it can do no harm and send it from there (select the file, right click, email to Alwil Software). No need to zip and PW protect when the sample is sent from chest. A copy of the file/s will remain in the original location, so any further action you take can remove that. Send it from the User Files section of the chest (select the file, right click, email to Alwil Software). This process has been modified in the latest version to make it easier, it doesn’t actually get emailed, but transferred when the next avast auto (or manual) update is done.
Hi EricFr,
The removal instructions are elaborately and amply discussed on the Sophos page:
http://www.sophos.com/security/analyses/viruses-and-spyware/trojiyusv.html
Mind you that on cleansing you disable system restore and use safe mode, and make a copy of the registry in case anything would go wrong, then meticulously work through the instructions given.
If a run of MBAM could clear all of it or a SAS sweep so much the better, download from here:
http://www.superantispyware.com/downloadfile.html?productid=SUPERANTISPYWAREFREE
If any signs of the trojan remains you could use the method I sketched to you in the first four lines of this posting,
polonus
P.S. Je vous souhait le bon weekend…
Thank all,
Only MBAM clean the Troj
Merci Bonne journée