Use more Ram or lower your thread-concurrency setting.
4GB should be enough ?? Which thread concurrency would you reccommend ? I read on a site that it should be a multiple of 64.
I tried 1600 (64*25) but it didn't work. I also tried 768 . And 320 .
But there is a difference , when i start it there is just one line where it says :"Started Cgminer 3.1.0" before i had the "Start Screen" .
It uses about 500 MB of RAM . So there are 2.5GB RAM left (1GB uses Windows , 0,5 GB Cgminer)