While many laptops allow downgrading BIOS to any version, the 830 G6 implements once a newer version with security fixes is installed.

Enter BIOS > Security > Secure Boot Configuration > Set to “Legacy Support Disable and Secure Boot Enable” (if Windows 10/11) or “Clear Secure Boot Keys” then “Restore Factory Keys”.

How to use the to troubleshoot a slow system. Interactive BIOS simulator HP EliteBook 830 G8 Notebook PC