回複：what's wrong with my notebook?

Indexing Service - cidaemon.exe

What does it do?
If you use Microsoft Indexing Service, cidaemon.exe might explain the high CPU utilization. This process builds and updates the Index catalog and typically uses a lot of CPU time. However, cidaemon .exe is also set to run at a low priority, so it usually doesn't degrade the performance of the system even if it's at a high CPU level.
Source

The Filtering component coordinates filtering of files. Its output is called a word list. This component is called by the Indexing component.
The CiDaemon.exe file contains the Filtering component. One executing instance of CiDaemon.exe exists for each Indexing Service catalog.