Please check the list of applications that works with Vista and are certified
to work .
http://support.microsoft.com/default.aspx/kb/933305
"Applications that have earned the "Certified for Windows Vista" logo or the
"Works with Windows Vista" logo"
I think CA AV was working with Vista beta or so but later editions of Vista
had some problem with CA AV. Please check the list if it has been listed.
Avast AV works fine for me with Vista ultimate.
"Denise" wrote:
> I'm trying to install CA Anti-Virus 2007, but during downloading it stops and
> a messages appears saying "Error E9009:Unsupported operation system-Windows
> Vista".