Screen Brightness

[THEROC]

Hello
All of a sudden, every time I reboot, my screen's brightness is all the way up. So, I go to 'Preferences' and bring it down to only happen again the next time I reboot.
Not a terrible problem, I hope, but not sure why the settings of this doesn't remain as I left it last. Perhaps I have picked up something OR I have a fault which could get worse?
Anyone seen anything like this?

 

[macpro2000]

Corrupt preference file...AppleCare will know the exact file to trash.

 

[Warbitrary]

Reboot less often

 

[upaymeifixit]

What computer do you have that doesn't have the F1 and F2 keys set up for screen brightness?