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Using Advanced Startup in Settings to boot from USB resets pin
This has happened on a few occasions recently in the past few weeks on 3 separate computers being worked on. I boot off of a USB to do a memtest. I use the Advanced Startup section in Recovery in 10/...
Secure Boot is designed to prevent unauthorized boot loaders, but when you boot from a USB prepared outside of the trusted environment, Secure Boot may flag it as untrusted, especially if the USB isn't signed or recognized as secure.