Selected boot image did not authenticate. Press <enter> to continue

[LaroyRU]

I fixed it. I had to update the BIOS first from F56 to F56A. After that the BIOS started saving the settings.

Now the most unexpected and important nuance: when you are restarting for the first time after turning secure boot off, pay attention to the small notice saying you must confirm saving this setting by entering a shown PIN-code + enter, otherwise those new settings in the BIOS are cancelled.

[pete26]

I'm glad, but I did not have the pin problem ? Be aware of HP updates I think they return your com to secured boot!

[xbao]

I was wondering why I wasn't being asked to confirm the change and it kept resetting. Turns out I had the time-out at the top of the boot options set to 0. Changed it to 10, disabled secure boot, enabled legacy, saved/rebooted and presto! confirmation screen and settings saved.

Taking a step back, it would be nice if BIOS updates didn't make system breaking changes to settings.

[pete26]

Everytime HP wants to do a system update I cancel it, reason...your system setting keep getting changed and you get the same message'selected boot etc etc' one would think they would fix this!

[jesharrington]

I get the same message but my laptop fell. On startup it goes straight to that message

[pete26]

Hiya, on startup tap F8 or F9 depending on your computer...you should be able to enter your bios. Edit this and change secured boot to legacy and save changes! After this don't let HP do there auto update cancel this and good luck.

[bbawl101]

Thanks, I just encountered the same problem and it worked for me as well. 

[hrithikbansal70]

After u installed the OS, did u disable legacy mode and enable secure boot?

[pete26]

do the opposite...enable legacy boot

[RichGamer21]

I ran a start up test and the results were hard disk short dst: failed
failure Id: GLJC3W-6KU80S-QFPJW1-60QW03
Product id: C2M11UA#ABA