Hi
I do not really know if this is a bug or what, i tried looking up in the BD help and Google... no solution. 
The problem is that i do not see the virus scan options in >Antivirus >Virus Scan >System Tasks, (pls refer to the image)

Vista Ultimate 32bit, BD 2009 Ver 12.0.11.4, Nvidia 7500GT
Kind regards
riz