Thanks for the help anyways... it seems as if the problem disappeared now. 
__________________
CPU: Intel Core 2 Duo E6300
MOBO: Asus P5BW-LA
PSU: CoolerMaster Power Extreme 500W
VGA: eVGA 9600 GT 512mb GDDR3
HDD: 250 GB
RAM: 2 GB DDR2
MONITOR: LG Flatron W2242TQ, NEC MultiSync LCD1530V
__________________
|