Windows 7: Computer get crashes/black screen while playing cs:go

Computer get crashes/black screen while playing cs:go, but I can still talk on skype in the backround. I have to reset my computer to get to play again.

There are no dump files. Hope you're following the Instructions correctly.
Also post this report: Windows Genuine and Activation Issue Posting Instructions

is it dumpfiles when I don't get Bluescreens?

Is it dumpfiles now?

I'm taking a look at it.
And your problem sounds like a hardware issue. It could be that your motherboard is going bad, or your GPU is.

Did you try your GPU on another computer? Does it work okay there?
You can also test your RAM

Take memtest. Run for 8 passes and test each stick in a know good slot for an additional 6 passes.

→ RAM - Test with Memtest86+
→ Guide to using Memtest86+ - Geeks to Go Forums

As I've seen, you need to update your graphics card drivers to their latest.

Follow either of the method below:
Option 1

1. Download and install Driver Sweeper:
   → |MG| Driver Fusion (Driver Sweeper) 1.2.0 Download
2. Select option 2 for NVIDIA.
   → Drivers - Download NVIDIA Drivers
3. Boot into Safe Mode from Advanced Boot Options:
   → Advanced Boot Options
4. Type in Driver Fusion in Search
5. Remove all components of your NVIDIA drivers
6. Boot normally now, and install the latest drivers from the
   auto-detect program you downloaded.
   (Requires Java)

Option 2
Direct Download (from unofficial website):
→ Download NVIDIA Forceware 306.23 WHQL Vista 64 - FileHippo.com for 64 Bit windows
→ Download NVIDIA Forceware 306.23 WHQL Vista - FileHippo.com for 32 Bit windows

Use the common way for uninstalling via Control Panel -> Programs -> Uninstall a program

Do this along with memtest and let us know the results.

I have latest driver, but I will test my ram. thank you.

Okay.. You should try your video card in another computer that it's compatible with the motherboard.
See if the problems occur on the other computer.

I have already tried, my friends video card in my computer and I got same problem.......

How old is the hardware of your computer?
Does it have an onboard VGA slot? Sounds like a motherboard issue