Win7 system notebook keyboard failure is not useful how to do?

The specific solution is as follows:

Operation steps:

1. Click Start, run (or WIN+R) to open the run and enter regedit to confirm;

2. Under the Registry Editor, locate: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E96B-E325-11CE-BFC1-08002BE10318};

3. Delete the UpperFilters item, uninstall the device, and restart;

4. After restarting, it still didn't use us to find that the device manager became: Code 10: The device could not be started;

NKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E96B-E325-11CE-BFC1-08002BE10318};

String UpperFilters, the content is kbdclass, uninstall the device, restart;

If this method can not be solved, please backup the data and reinstall Win7 system.