I would recommend always having F-prot (it's a dos Antivirus)

you can get it from here

F-prot

extract the Zip to c:\f-prot


you can always boot from a floppy and get to dos - it's very good - cleans just asbout anything..


make sure you update it :

Signature Update

Extract this file to c:\f-prot

Macro Virus Definitions

copy this file to c:\f-prot


enjoy