Hello.
Practically comparatively new product: Active virus shield (AOL) is light and freeware version from Kaspersky Antivirus.
http://www.activevirusshield.com/antivirus/freeav/index.adp
http://www.kaspersky.com/faq?qid=194134869
I have tested it and found that is enough quick strong and free deserves to integrations with unattended windows installation.
Unfortunately I can't found any ways to run it installation in silent mode.
Even Active virus shield main installer - avs.msi can't support switches /quiet /passive.
I'll be grateful for any help.