I FIXED IT!!!!!
REMEMBER THE CATALYST CONTROL CENTER FOR ATI-RADEON 4250!?!?!?
JSUT GO INTO IT, AND GO INTO THE POWER SECTION, THEN LOOK AT POWER PLAY, AND DISABLE VARI-BRIGHT CONTROLS!
THEY DO NOT WORK PROPERLY ON WINDOWS 8
if it works for you, im glad i helped, im glad i dont ever have to see that dumb message again :D
This works like a charm on Windows 7/ATI-Radeon HD 4200 !!!!
Thanks for your help and may it be helpful to the others !!!!!