I also had the same issue. I tried to unistall the AMCAP from(In Windows 7: Start programs-->AMCAP-->unistall) multiple time and restarted the System. But still getting error 8007045a this error. Googling it i found this is due to Google clientAdapter 0 some ***.
So This time i did 2 thing.
1. Unistalled the google chat from the Control Panel-->Unistall-->Google Chat
2. Unistalled The Webcam Drivers(From Control panel and not by 'Start programs-->AMCAP-->unistall' ) i installed.-->Restart the PC-->install the Webcam Drivers
By doing this i am not getting the annoying Google Adapter 0 or 1 in Devices and also able to use webcam.
Note: I got the solutio by random way of trouleshooting and little bit googling.
Just reply if it solves ur problem