En attendant les patchs d'Avril...
Est déjà sorti, le :
Malicious Software Removal Tool est déjà disponible. Il cible :
**A small number of Bagle variants (O, P, Q, S, T, and AW) are able to infect legitimate files on your computer. As of March 8, 2005, the current version of the removal tool is unable to repair these infected files. You should scan your system with an up-to-date antivirus product if any of these variants are found on your computer.
***W32/HackDef usually hides other potentially unwanted software on your computer. If the cleaner tool reports that W32/HackDef was detected on your computer, it is highly recommended that you run a scan with up-to-date antivirus and anti-spyware programs (see http://www.microsoft.com/spyware). If you would like to view the software that W32/HackDef was hiding, first open the log file for the cleaner tool (%WINDIR%\debug\mrt.log). Next, in the Scanning Results section, find the line or lines that note the folder in which Win32/Hackdef was found. In that same folder, you should find the Win32/Hackdef configuration file with the .ini file extension. View this file to determine the software that Win32/HackDef was hiding on your computer.
Le fonctionnement est simple : Windows Update. Si il ne trouve rien, il ne dira rien...
Source : http://support.microsoft.com/?kbid=890830