Computer keyboard not to use what to do keyboard unresponsive solution

Error status

Our keyboard cannot be used in device management under the management of the system see the keyboard has a yellow exclamation mark icon, as shown below

Solutions

1. Open the computer's "Start Menu" and then find the following run, in the pop-up run box to enter "regedit" and then enter the system "Registry Editor";

2. In the system Registry Editor, we navigate to the hkey_local_machine\system\currentcontrolset\control\class\{ 4d36e96b-e325-11ce-bfc1-08002be10318} "

3. Then right-click on our blank position, select New multiple string value, named UpperFilters, right click UpperFilters, select Modify, fill in the data value for Kbdclass (input value, you can use soft keyboard operation input letter), OK, after Restart your computer and the keyboard resumes normal use.

Note: Registry operation we must be careful oh, or accidentally want to be able to make other functions bad, serious system can not be used directly.