1. Press WIN in the system, enter "CMD" in the search bar, right-click the found cmd.exe and select "Run as Administrator";

2. Enter "bcdedit-set load options enable _ integrity _ checks" and press Enter.

3. Enter "bcdedit -set TESTSIGNING OFF" again to close the test mode and remove the watermark.

Extended data

Test mode allows the system to install unsigned drivers. Usually this watermark appears because an unsigned driver is installed in the system. In order to install these drivers themselves, the process of opening test mode will be built into the installer.

Test mode already exists in VISTA system, including Windows 10. Test mode refers to the test mode.

Other common faults

1, the power indicator is on, but the screen is black when the system is not running.

After the laptop presses the power button, the power indicator lights up, but the screen is black. You can find a monitor, connect the laptop, and make sure it is in the external display state. If the external monitor can display normally, it means that the processor and memory of the notebook computer are normal, and there may be problems with the LCD screen, screen cable, graphics card and motherboard.

If the external monitor does not display, or the screen is black, then the problem may appear in the graphics card, motherboard, processor, memory and so on. Some of them were dismantled and upgraded, but they were not firmly inserted when they were put back.

2. Booting or running crashes or the system restarts automatically.

This situation is generally caused by operating system or software such as application programs, problems with system files, virus infection, the model does not support the system, and conflicts with application programs.

Of course, it may also be other problems. For example, if the temperature of the laptop is too high, the laptop will crash, and there are many cases of automatic restart, such as cleaning the laptop or adding a cooling base.