|"I am using Vista7"|
Vista7 does not exist - you mean either Windows Vista or Windows 7 don't you?
Now to your problem.
The Aspire 9300 requires two separate installations -- the actual webcam driver plus the "Bison" application. It's available on the Aspire website (I just checked).
Please be aware that Acer don't support Windows 7 on the Aspire 9300, only XP or Vista. Therefore the functionality of the webcam may be adversely affected.