Thanks for replies.
Slash3r: I'm using my old config where fps is set to 101 so that shouldn't cause this problem.
Lomai: this is my computer configuration:
Intel Core i3 350m, 2,26 GHz, NVIDIA GeForce GT325M 1 GB, memory: 4 GB DDR3 1066 MHz, Win 7 64bit
etc..
And i updated graphic
driver just few days ago..
Maybe i found out what causes the problem. I have RivaTuner on both of my computers. I'm not rly sure what does it mean, but my Generic PnP Monitor on my old computer is set up according to its graphic card (nvidia geforce 250gts 1gb). But, however, Rivatuner on my laptop shows that Generic PnP Monitor is Intel Graphics Media Accelerator and the original graphic card is just set up as default monitor.
As i said, im not quite sure what does this mean and if it causes the problem. How can i change these settings please?