Hello. I have an HP pavilion ze5160 laptop (2.0GHZ) running Windows XP SP2. I am having a very annoying problem. While in XP the computer lags and stalls approx. every 10 seconds and the lag only lasts for a split second. At the same time i get CPU spikes even if I have no programs running going from around 5% usage to 40% usage. The cursor will freeze up and if i am trying to type something my keystroke will not get recorded. I upgraded my RAM to 768mb with no luck, I ran scandisk on the hard drive with no bad sectors found, and I have scanned for viruses finding nada. Also, i checked the processes running and found no foreign programs that could be a virus. Does anyone have any ideas as to what might be causing this? Any help would be greatly appreciated.

Thanks,
Jon