Hi there, this is my first post so forgive me if anything is out of place. I am getting periodic patterns of lag across my whole computer that consistently affect me every 2-3 seconds for a second or 2 (so all the time) and it's really starting to get on my nerves. When starting up a game like World of Warcraft for instance, the login screen will remain smooth for about 12.5 seconds (yes, i've timed it) and then the fps will drop dramatically for 2-3 seconds before catching itself up, and it does this consistantly every few seconds. I then found it affected numerous other programs such as internet windows, other games and general control panel windows... the only thing that doesn't seem affected is sound - music does not stutter with the rest of the system. My specs: System model: dell Inc. Precision WorkStation 470 OS:Windows XP Professional Service Pack 3 (build 2600) Processor:2.80GHz Intel Xeon (2 installed) Hard-drive:ST3400832AS [Hard drive] (400.09 GB), s/n 4NF2GHDX (SATA) Motherboard: Dell Inc. 0T0820 , CN1374049H00YJ, bus Clock: 800 megahertz BIOS: Dell Inc. A07 03/15/2006 Memory: 3GB (2x512MB & 2x1024MB) DDR2 Graphics card: NVIDIA GeForce 9500 GT Now I've tried many, many things so far to correct this issue such as, you may laugh at some of them: Re-installing drives... Cleaning the inside of the computer... Flashing the BIOS... Removing the PCI Bus and re-installing each hard-ware device... ...many more I can't think of right now but I know it's nothing to do with application sharing or the internet as it still persists with the modem off. I've inspected the temperatures of both the graphics card and processors but there seems to be nothing out of the ordinary there either. Any, and I mean any suggestions at all would be most welcome, thanks for staying with me if you got this far!