There are 2 reasons, one is the motherboard problem, the likelihood is not large, the other is the keyboard and mouse driver and other programs have clashed. It is recommended to put the keyboard on another computer to test, if the normal on other computers, it may be the driver or hardware problems
Note: The USB interface Keyboard Mouse does not exist this problem, just need to wait 10 seconds for the computer to recognize.
If you are the first time you start a computer, this problem is mostly because your PS/2 keyboard mouse is connected to the host after the host is started, so the host is unable to recognize the PS/2 keyboard mouse, the solution is to speak computer shutdown, keyboard mouse connection to boot
Second, not the first time, the mouse keyboard problem is mostly the mouse keyboard itself, change a mouse keyboard or computer to try.
Third, the elimination of the mouse keyboard itself, there may be a host to the mouse keyboard power supply is insufficient
Four, the system enters the safe mode
Safe Mode automatically disables all non-system startup items and frees up local control over Windows for these files. Safe mode is available on all Windows products.
V. Killing of virus
Solutions
1. First Unplug all live lines on the motherboard, including cable, power cord, and video cable.
Buckle the battery on the motherboard, static wait 1 minutes to put back, some students after this step after the USB mouse keyboard or round mouth mouse keyboard boot can be used.
2. If you still can't use it, then look down.
Locate the CMOS jumper on the motherboard, labeled clear CMOS next to it, unplug the jumper cap and remove the CMOS with a short connection such as tweezers or copper wire.
3. The keyboard mouse does not respond after the boot
Plug back into the jumper, boot, is not the mouse keyboard can be lit it?
4. Enter Safe mode, we can exit Safe mode to solve
5. Poisoning must be an antivirus.