I'm running Windows 7. It seems that svchost is eating up a lot of memory.
The user name for the particular svchost instance is "Network Service". The description is "Host Process for Windows Services".
Sometimes it eats up 50% of the CPU usage. Other times, it's just under 5%. I can't figure out when it's 50% and when it's not. But it fluctuates often -- even when I've just booted up and no programs were started.
How do I diagnose this?