Compiz killen via terminal, thanks Google Solution:
And thanks to everyone!
Booted into Ubuntu,
selected Terminal Service and logged in.
In terminal window get in to the gconf-editor (in failsafe mode) (type: gconf-editor @ command line/Enter)
I navigated to the /desktop/gnome/applications/window_manager/
There's two keys(entries) that need to be removed (just delete the contents of default and current).
Current: USR/BIN/COMBIZ
Default: USR/BIN/COMBIZ
After making the changes, exit the gconf-editor.
and enter exit (to exit terminal)
Your asked to login again, everything is fine.
Back to normal.
Again, thanks for everyones help.
LH
<oplossing komt van het engelse ubuntu forum>
EDIT:
Current: USR/BIN/COMBIZ
Default: USR/BIN/COMBIZ
Alles achter de : verwijderen.
Current en default zelf laten staan.