If you want to start with a USB flash drive, you must enter the BIOS to set the relevant security options. You can boot from the USB flash drive by turning off the secure boot and turning on the boot CSM.
An invalid signature was detected. Check the security boot policy in the settings → Invalid signature detected. Check the security boot policy settings. This is the prompt that the driver is unsigned.
Take XP as an example, right-click my computer to select Properties, find the Advanced tab, find the following startup and troubleshooting items, and click Settings. In the pop-up window, I found that there are three options in the middle of' system failure'. The third option will automatically restart, and the check of this item will be cancelled. If there is any problem in the future, the blue screen will stop.