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Is the problem that the desktop picture leaves a blank spot on the right side?

Did you check desktop/screensaver in system preference * fill screen -fit to screen - stretch-etc* ?
 
There is not only blank spot on the right sight but also the Dock will not occurre and stay hidden even if i try to work with my mouse.

I checked desktop/screensaver - didn't help. Thanks for your idea - thewap.
 
Perhaps a corrupted account, maybe if you delete the wonky account and then recreate it.
 
This is definitely a software issue. Maybe a repair reinstall of OSX? You are also running a few programs at startup it seems. Try disabling them at startup and see if it fixes the problem.
 
Repair disk and disk permissions first. If it still persists then try an OS reinstall (backup recommended but not required). Reinstalling the OS will just overwrite the current OS files with new ones, and usually it would end up pretty much the same as before. It will correct any minor problems in the OS that may have came up (missing system files, corrupt system files, etc).
 
This is definitely a software issue. Maybe a repair reinstall of OSX? You are also running a few programs at startup it seems. Try disabling them at startup and see if it fixes the problem.

I did - no change.

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Repair disk and disk permissions first. If it still persists then try an OS reinstall (backup recommended but not required). Reinstalling the OS will just overwrite the current OS files with new ones, and usually it would end up pretty much the same as before. It will correct any minor problems in the OS that may have came up (missing system files, corrupt system files, etc).

I did - no change
 
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