Thanks for the English translation. Please have a look at this Knowledge Base article:
It has not yet been translated, unfortunately.
The short answer is that the problem is excessive "Commit Charge" by your running applications. Windows commits memory address space to applications and the maximum address space it can offer is your physical memory + your virtual memory. You might have physical RAM left, but Windows can't use it anymore because it has already committed all of its address space to your running applications. This warning is telling you that the OS is reaching the limit.
So, one solution is increase the swap file as Frederick added. This raises your maximum.
Another is to look at your running applications in Task Manager and find which is greedily consuming the "Commit Size." Shut them down if you can.