I don't know if anyone has come accross this, it's really nothing more than a hassle, but I'm just curious if anyone knows a fix.
I have Windows Vista Business with Service Pack 1 installed, although this issue has been going on prior to SP1.
If I right click on "Computer" and go to "Properties" then in the system properties page click on "Device Manager" I get a "Called by app" Error message. Once I hit OK it goes away and lets me into device manager. I don't know why this is happening. If I go to "Device Manager" any other way I have no problem. i.e. though "Computer Management"
Here's the screen shot:
Linear Mode
