I recently formatted my system (desktop pc)..

all seems right except for the screen resolution..

my problem is even if i set my screen resolution to 1024*768 or other resolution...
my system doesn't save this setting.. instead, everytime the computer boots i am left with an 800*600 screen resolution.. even after i had set the desire resolution it always go back to 800*600 whenever i restart the pc.

guys can you help me? what could be the problem..?