My crossfire does not load when I give a start in the room

My crossfire does not load when I give a start in the room, just stays on loading, and when I want to change the desktop window with Alt + Tab, I freeze and the screen goes black.

This began to happen after the last patch, which was to file HGW

my computer is a Laptop:

Dell Inspiron 15
AMD Athlon II Dual Core 2.30 GHz P360
3 Gb of Ram
OS Windows 7 Home Basic 64-Bit
Graphics Card ATI Mobility Radeon HD 4250 512 Mb

and when I was running the crossfire to 120 FPS