Changing Desktop Appearance causes restart

[mik_o4]

I need some Help. When I try to change the Appearance of the Desktop in Ubuntu 9.10 it causes the computer to go to the start up with progress bar screen
Here is what I see.

http://mikosoftworks.com/Ubuntu/Ubuntu-9.10_Desktop-1.jpg

Then I see this for 3 seconds.

http://mikosoftworks.com/Ubuntu/Ubuntu-9.10_Desktop-2.jpg

After that it goes to this screen

http://mikosoftworks.com/Ubuntu/Ubuntu-9.10_Desktop-3.jpg

It stays on this screen for 5 seconds, then goes blank for 3 seconds and this screen reappears. It stays in this loop until I manually shut down the system.

[doas777]

have you been running this desktop install long? if not, try reinstalling. somthing is seriously messed up if it is actually shutting you down.

[mik_o4]

reinstalled 2 times with the same result