Screen becomes grey


Hello

I have a problem. Blender control panels and every windows become grey a little moment before a begin to use. I have a resolution screen of 1024*768 and the graphic card of 256 MB. I dont know what happens.

First, Istarted ande everything is correct. Later I move the mouse and the panel that I am over it, it is visible.

Thank you!!

Thank you, but nothing repair