Win7 system notebook keyboard failure how to do

Solution:

1. First use the shortcut key “win+R” to open the “Run” window and enter “ldedit” in the window. Click Enter to confirm;

2, then expand in the Registry Editor: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E96B-E325-11CE-BFC1-08002BE10318};

3, then delete the UpperFilters item , Uninstall the device, restart;

4, then restart or find the device manager becomes: Code 10: The device can not be started, then expand HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E96B-E325-11CE-BFC1-08002BE10318}; Br>

5, finally add the string UpperFilters item, the content is kbdclass, uninstall the device, restart;

6, if the above method can not solve the problem, please backup the data, and then reinstall the system .