IMHO the App Virtualisation of a Anti-Virus is not a good fit, AV requires a close coupling with the OS to be completely effective, App Virt isolates the virtualised application from the OS and can not affect it. so, by that statement a App Virt'ed Antivirus package would only be functional with in the application virtualisation bubble. and not for any other applications or more importantly the OS
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Tom Howarth VCP / vExpert
VMware Communities User Moderator
Blog: www.planetvm.net
Contributing author for the upcoming book "[VMware vSphere and Virtual Infrastructure Security: Securing ESX and the Virtual Environment|http://my.safaribooksonline.com/9780136083214]”. Currently available on roughcuts