I noticed a lot of people have problem with CPU spikes with "SYSTEM" process. I’m having this problem too, but different than I expected, the problem is not on Windows, but with NIS 2012. Some time ago I noticed that problem, then I downloaded Process Explorer and I discovered that the Thread ID "216" Start Adress "SRTSP64.sys" is the cause of all my problem. Some research in "System32" and web, discovered that "SRTSP64.sys" is NIS Auto-protect driver. Then I disabled Auto-protect, and cpu usage was normal again…. until started all over again. Disk and memory usage is fine, problem is only with CPU usage, but really, for me that have a dual-core, 50% cpu usage REALLY makes a lot difference. I just cant keep using my pc because my AV use 50% of it constantly.

Norton Internet Security / Norton AntiVirus topics