rob presented the following explanation :
The usual suspects are:
Avast 4 Home Edition
http://www.avast.com/eng/avast_4_home.html
AntiVir PersonalEdition Classic (also available in German)
http://www.free-av.com/
AVG Free Edition
http://free.grisoft.com/doc/1
and there is also a "goody" from Microsoft
http://www.microsoft.com/athome/security/protect/windows9x/antivirus.mspx
where you can find a 12-month free trial of EZ AntiVirus from Computer
Associates.
Also there is a Dutch newsgroup nl.comp.virus where you could have asked
this question (in Dutch).
Je had dit ook in nl.com.virus kunnen vragen en dan zelfs (bij voorkeur)
in het Nederlands.
;-)