Re: not sure why
virus scan, defrag, and when you press control,alt,delete and then see what is bieng used more ram or pross its under the performancearea of that window and post what it is saying. Also what are you specs and what are you doing when this happens.
2.4 Ghz celeron, 1.25 PNY pc 2700 RAM,PNY VERTIGO 5200 FX , 40 GB HDD
900Mhz 256 RAM , MX 4000, 30 GB HDD
1.9Ghz dual core AMD Athlon 2 GB 384 VRAM 320 Gb HD
2.3 tricore phenom,2 GB RAM , EVGA 9600 GSO,250 GB SSD
2.6 X4 620, 4GB RAM, 9600 GSO, 500 GB HDD/I'm part of The Project