Vista - Every games crash on vista 64 ultimate

Hi.
I have a problem with vista 64 ultimate.
When i play a game, there is nothing, it never crash or anything.
But when i restore games to minimize it half so i can do other stuff, so the game is running in the background on the desktop then it crashes.
Like if someone writes a email, and i want to copy the name to a text document, then i restore the game, to get it on the backgroud so i can read the email and write it down.
But after 5-10 sec if any game is restored,then my comp crashes.
Once i gotten blue screen of death but it normally goes black screen.
Its like vista ultimate 64, cant handle a game running on restored mode, so i can maximize it again for full screen.
And that is really annoying.
It also shuts out the possibility to play games in windowed mode.
If i play a game in windowed mode it dont crash but if i click on a icon like my computer then there is 5-10 sec time before it crashes unless i come fast back clicking on the game again.
Hopefully all get the point of what im saying.
Hope anyone can help me please.
Thanks randomguy

System Information
------------------
Time of this report: 6/7/2009, 19:51:28
Machine name: NA
Operating System: Windows Vista™ Ultimate (6.0, Build 6001) Service Pack 1
System Manufacturer: System manufacturer
System Model: System Product Name
BIOS: BIOS Date: 12/09/08 18:48:23 Ver: 08.00.15
Processor: Intel(R) Core(TM) i7 CPU 965 @ 3.20GHz (8 CPUs), ~3.2GHz
Memory: 6134MB RAM
Page File: 2347MB used, 10118MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6001.18000 32bit Unicode
Card name: NVIDIA GeForce GTX 295
Sound Devices: (SoundMAX Integrated Digital HD Audio)
Motherboard: Asus rampage II extreme

forgot to tell it dont crash if i minimize it to process line. only when its windowed running in background

Sounds like a video driver issue.

And this happens with all games and windowed mode?

yes all games from a to z it dosnt matter. i get crash and black screen.
i tried the simple way disconnecting all from comp even with monitor only in computer then its black screen as well. im 100% sure its caused by windows but what cause it?

Check event viewer logs to see if it's a Desktop Window Manger (dwm.exe issue)

Can you attach a mini-dump from C:\Windows\Minidump

okey how do i do what u say?
I know only little on computers.

I thought i would post this for some help
if you have a game that is not compatible with your computer check and see if it is on steam or a program made by Microsoft called games for windows live if its on there either sell or return your game then by it on one opf those programs and your computer should run better than how it was on the disk or it should be able to run period!
Just Some Help
-Linkman88

It does the same thing if its games for windows.
It dosnt matter what games it is.
I think im gonna have to format, and then say **** my hardware and go back to something that actually works, like xp or maybe hope windows 7 64bit comes soon.
Because this is annoying, i never seen a operating system with such many flaws, as windows vista ultimate 64 bit its terrible...