I found the same problems. I got a 60 day demo of Norton Internet Security 2007 for downloading Adobe Acrobat Reader 8.0 and I found it was a lot easier to turn off that Vista feature and let Norton handle security.

Anyway I heard Microsoft is being sued for those "Vista ready" PCs not being as ready as customers thought they were. I had a Vista ready desktop and I got lockup and driver issues, and I removed the Vista demo and went back to XP. If you install Vista without a CD Key you get like a 30 or 60 day demo. No need to activate but it will ask for a key when the demo expires.

Anyway a lot of people are upset that the features in Vista Home Premium and higher are not available due to hardware limitations in Vista ready PCs. That Microsoft should have said Vista Home Basic ready and Vista Home Premium ready for the different Vista ready PCs. I think there might be a lawsuit over that.