Close permanently:
1. Right-click Start Press and select "Command Prompt (Administrator)";
2. enter or copy bcdedit.exe/set nointegritycheckson and press enter;
just finish executing the command.
to restore the signature, just type or copy:
bcdedit.exe/set nointegritychecks off in the "command prompt" and press enter.
Method 2:
Temporarily shut down;
click start-settings-update and security-restore-click "restart now" under the advanced startup item on the right to enter the advanced startup-select "troubleshooting"-advanced options-startup settings-restart-and then press the number key 7 or F7 (that is, disable the forced signature mode of the driver).
when the system is restarted, digital signature will not be needed.