PC crash during playing the game

[lehu]

Hello guys.
I got a problem with crushing during editor and multiplayer. It is going randomly, sometimes i can play 2 hours without crush, sometimes i can play only 10 minut and i got a crush. When it comes i have to rebot my PC. I checked temperature of my PC during the game but it goes max to 52C so I dont have idea what is wrong. I have read some topic about this problem but nowhere found help. Maybe someone of you know how to fix this?

This is my pc:
AMD Athlon II x2 255 3,10 GHz
EAH6850 directCU 1GB
4 GB ram
Windows 7 64bit

[Clowns2]

Could it be a memory problem? Did you check TaskMananger to see if you have any other programs running in the background that could be taking up your memory?