Multiple Programs – MSN.EXE

A file called msn.exe installs with The Microsoft Network, a popular online service by Microsoft and some versions of the MSN Messenger IM and Buddy list program. More info can be found at http://messenger.msn.com/.

Unfortunately, it also installs with a number of viruses, many of which spread via MSN Messenger. Following are the more common ones with links to more information for each:
W32.Flita - http://securityresponse.symantec.com/avcenter/venc/data/w32.flita.html

W32.Simic.Worm - http://securityresponse.symantec.com/avcenter/venc/data/ w32.simic.worm.html

Backdoor.Ducy - http://securityresponse.symantec.com/avcenter/venc/data/backdoor.ducy.html

W32.Alco.AB@mm - http://securityresponse.symantec.com/avcenter/venc/data/ w32.alco.ab@mm.html

VBS.Slip@mm -

W32.HLLW.Ajja - http://securityresponse.symantec.com/avcenter/venc/data/w32.hllw.ajja.html

Backdoor.Graybird.I - http://securityresponse.symantec.com/avcenter/venc/data/backdoor.graybird.i.html

W32.HLLW.Fatee.B - http://securityresponse.symantec.com/avcenter/venc/data/w32.hllw.fatee.b.html.

Safe

Microsoft