Win7 system can not sleep pop-up Energy Policy Manager can not be retained how to do?

  

The win7 system can't sleep. What if the Energy Policy Manager can't be reserved?

1. Press “win+r” to call out the operation, enter “ldd;cmd” in the run box and press Enter to open “Command Prompt”;

2. In the command prompt box, type “powercfg -h off” then press the Enter key and restart the computer;

3. After restarting the computer, follow the first step to reopen the “Command prompt”. ”, enter "ldcfg;powercfg -h on" in it; press the Enter key.

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