Macbook Pro will not shut down/restart/sleep/log out after Mountain Lion update

Dear all,

I upgraded from Lion to Mountain Lion yesterday and since then I have encountered a few issues:

- The only way I can shut down my computer is to hold down the power button or entering commands in terminals. The commands under the Apple menu do not work at all. No window opens when I click on it.

- The about this mac, force to quit, sleep, shut down and restart button, log out do not work.

- When I restart my computer, it takes 3-4 minutes to log into the account (it used to be less than 1 minute, I have an SSD).

I have tried all of these solutions to solve the problem:

- I created another user account and I do not encounter the same problems. It logs in quickly, can shut down etc.

- I have repaired the disk and the disk authorisations using disk utility

- I have cleaned up all caches and did maintenance using OnyX

- I have cleaned up all ACL using terminal

- I have never installed Kapersky (this was the cause of the problem for some people in the past)

I am starting to be a bit short on ideas. All I know is that there is a problem with my user account. I do not want to do a clean install as I have quite a lot of work stored on this user account and preferences that took me ages to set up. If I have to start fresh I will but I would rather avoid this extreme solution.

Has anyone else experienced such an issue? If yes, how did you solve it?

Thank you very much