When installing or repairing the system, we often choose to start it through USB flash drive or UEFI. However, in this process, sometimes you will encounter the problem of safe startup error, which will make the operation impossible to execute. So how to solve this problem?

First, we need to know what a safe boot is. SecureBoot is a UEFI function, which verifies all startup files during the computer startup process to ensure that they are safe and have not been tampered with. If the secure startup finds that the startup file is unsafe, it will prohibit the startup and protect the system security.

When we start through USB flash drive or UEFI, if the USB flash drive or startup file is unsigned or the signature is tampered with, a safe startup error will occur. The solution is as follows:

First, turn off the secure boot.

This is the easiest way. When entering the BIOS setup, find the safe boot option and turn it off. Of course, turning off the safe startup may also reduce the security of the system, so restart it in time after the operation is completed.

Second, use a signed startup file.

If you need to execute a program during startup, you can try to replace the original file with a signed startup file and then start the operation. This method needs to ensure that the source of the signature file is reliable, and the signing certificate has not expired or been revoked.

Third, re-create the U disk startup disk or startup file.

When making USB flash drive startup disk or startup file, you need to ensure that the tools and methods used are correct and the startup file is signed. If the startup disk or file you made has a safe startup error, you can try to make it again.

Fourth, upgrade UEFI firmware.

If the version of UEFI used is too old, it may lead to the problem of wrong safe startup. In this case, you can try to upgrade the UEFI firmware for better compatibility and security.

In a word, we can solve the problem of safe startup errors when starting a U disk or UEFI by turning off safe startup, using the signed startup file, remaking the U disk startup disk or startup file, and upgrading the UEFI firmware. The most important thing is to be patient and cautious, and pay attention to safety when operating.