One, if the safe mode under the key is normal, usually caused by viruses or system problems;
1, it is recommended that you update the antivirus software patches and full disk check for viruses;
2, in the "computer" on the right-click and select "properties", "" Device Manager "to find the" in front of the keyboard device "
2, the keyboard device is a device that can be used by the user. "------" Device Manager "to find the keyboard device in front of the" + "sign to expand, right-click and select" uninstall "; and then restart the machine! The test.
3, if the above approach still can not be resolved, we recommend that you first backup save important data to an external storage device, and reinstall the system, it is recommended to use the pure version of the system CD-ROM installation.
Second, if the above method is still invalid, or safe mode can not be used, generally is the notebook keyboard key hardware problems.
It is recommended to go to after-sales testing.