First, check whether a key on the keyboard is stuck. If not, it is recommended to kill the Trojan horse and repair the system.

Kill trojan horse

It is recommended that you download windows Cleanup Assistant to kill malware and Trojans (please search and download, do not use 360 guards instead).

System restore

Please use the system that comes with the system to recover until there is no such fault (or use recovery software to recover the system. If you cannot enter the system, press F8 to enter the safe mode to restore the system).

System disk repair

If the fault remains, use the system disk to repair, open the command prompt and enter SFC/SCANNOW(SFC and/) to insert into the original system disk repair system, and the system will automatically compare and repair.

Bios settings

If the fault still exists, set the optical drive in BIOS as the first boot device, insert the original system installation disk, and press R key to select "Repair Installation".

Reinstall the operating system.

If the fault still exists, it is recommended to reinstall the operating system.