http://superuser.com/questions/527401/high-cpu-usage-by-the-system-process
在工作中，查看哪个进程占用过多CPU或内存不是那么简单的事，可能很多进程都依附于SYSTEM或是SVCHOST.EXE。
那么，如何进一步查看呢？
被微软收购的 Process Explorer.就派上用场了。
Download and run it, then select the System process, right-click and select Properties:
Switch to the Threads tab (ignore the dialog box that mentions symbols):
This will show which file is using the excessive CPU usage, from which you can then attempt to diagnose it.
