Right this one is odd and very very annoying.
I can't uninstall programs, I can't view a lot of control panel items including TCP/IP properties and I neeeeed to! The window simply greys out, but, it doesn't show as not responding in taskman. The only way around this is to stop rundll32.exe process, but that simply clears the problem off the screen and wont allow me to access the properties of TCP/IP for example.
Anyone seen this odd behaviour before?