Video Issues

Hello to everybody, first time i i post here.
I have video issues with my laptop Toshiba Satellite a105-s2712, more information:
-CPU type :Mobile Intel Pentium M 740, 1.73 Ghz,
-Motherboard name : Toshiba Satellite a105
-Motherboard Chipset : Intel Alviso-G i915GM
-Byos type : Insyde (05/18/04)
-Ram : 512
-Video Adapter : Mobile Intel (R) 915GM/GMS, 910 GML Express Chipset Family.

According to Everest Home on a Windows XP home edition.
The problem is that 2 years ago i played games like "Diablo 2" or "Warcraft 3" without any problems, but like 4 months ago whenever i start the game or i do "alt+tab" to minimize, the black screen blinks like for 6 or 7 seconds.
Like 3 months ago i downloaded from the intel site the chipset graphics driver version 2.11.15.0.
I dont know whats the problem, have something to do with the Bios driver update?
Please help me, thank you for your time.

btw this is the video configuration, i posted in reply but it didnt show.

http://img371.imageshack.us/img371/6374/configurationvideovv6.th.jpg

 

I put this screenshots with my video configuration. Thank you again

http://img371.imageshack.us/img371/6374/configurationvideovv6.th.jpg

 

Can anyone help me?