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What should I do if the macro control system on the computer can't open and display an invalid signature?
1. There is an invalid signature in the security startup policy. When starting the machine, press F8 to enter the safe mode, and then restore it to a problem-free time period through system recovery in the safe mode.

2. If you want to start with a USB flash drive, you must enter the BIOS to set relevant security options. You can boot from a USB flash drive by turning off secureboot and turning on LaunchCSM.

3. InvalidSignatureturetedChecksSecureBootPolicyinsertup → Invalid signature detected. Check the security boot policy settings. This is the prompt that the driver is unsigned.

4. Take XP as an example. Right-click my computer, select Properties, find the Advanced tab, find the following startup and troubleshooting items, and then 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.

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