Take note of critical Office 2003 update and MiMail worm - TechRepublic:
"Fix
Symantec has posted a free tool for removing MiMail variants A through E, which will:

End the W32.Mimail viral processes.
Remove the W32.Mimail files.
Delete dropped files.
Delete the worm’s registry values."

http://securityresponse.symantec.com/avcenter/venc/data/w32.mimail.removal.tool.html

http://techrepublic.com.com/5100-6264_11-5104786.html