How do I reset the BIOS to default values?
There are two ways to reset BIOS: Go to BIOS and press F6 to load optimized defaults, or short the Clear CMOS jumper (JBAT1) on the motherboard for about 5-10 seconds while the computer is powered off. (Page 39, 49)
From the official Msi B550-A Pro Motherboard manual, page 39
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