My computer ( A macbook pro) also did this, but mine error only included displays. It started when i stupidly 'screen rotated' my screen by holding down shift in system preferences and then clicking on displays and therefore clicking screen rotation.

My computer ( A macbook pro) also did this, but mine error only included displays. It started when i stupidly 'screen rotated' my screen by holding down shift in system preferences and then clicking on displays and therefore clicking screen rotation. However, when i came back to undo it (by clicking on 'displays' in system preferences) this message came up:

'Preferences error - Could not load displays preference pane'

I have tried the below but nothing changed either.

1) Close all windows & apps

2) Go to the System Library by selecting Finder, the hold the Option Key, then click on the Go tab at the top

3) Open the Application Support folder

4) Open the Dock folder

5) You should see desktoppicture.db in the Dock folder

6) Drag the desktoppicture.db to Trash

7) Reboot and you should be Good-To-Go

This is driving me crazy. If anyone could it would be great.

Thanks