1, start the on-screen keyboard if the keyboard we are using suddenly fails, and can not find a solution, but the work on hand can not be delayed, you can first enable the on-screen keyboard, for emergency use, the on-screen keyboard enabled shortcut key is the windows logo R key, and then enter the OSK command will appear on the on-screen keyboard, Of course, it is also necessary to deal with the keyboard failure in time. 2, Detect whether the poisoning keyboard failure may also be caused by poisoning, at this time you can use security guards to scan the computer, if it is the problem caused by poisoning, you can sweep out the virus after the virus can be removed.