is this a worm

[suitcase]

I keep getting this message to scan for the"nachi worm". Does anyone know anything about it. Anti virus doesn't show that I have it on my PC. Help!

[bigandy]

Check this link out: http://securityresponse.symantec.com/avcenter/venc/data/w32.welchia.worm.html

[pam123]

Read this also : http://support.microsoft.com/default.aspx?scid=kb;en-us;826234