Symptoms: cpu frequency is locked in the Task Manager to see the cpu speed of 0.48Ghz, the reference frequency is 2.2Ghz.
Try Solution: 1. Power Options, the minimum processor state is set to 99, to see whether the speed up.
ps: After setting the theoretical speed of 0.99 * 99 = reference frequency of about 2.2, but still did not change after setting or 0.48, and the computer is still very slow.
2. Reset the power options, power options to see whether a problem. not solved.
The previous experience, the laptop unplug the power cord, using the built-in battery, this time to see the speed change immediately, indicating effective. Then plug the power supply line, cpu frequency change effectively. problem solved.
Figure similar symptoms,
(Source https://answers.microsoft.com/zh-hans/windows/forum/windows_10-performance/win10%E6%9B%B4%E6%96%B01709%E5%90%8Ecpu%E9%94%81 / 25084b40-64f1-4045-b856-49921dff92ba? tab = AllReplies # tabs)
