Hi George,
I don’t know if you are still having a problem, so I ask AI about it. Here is the response.
Since you’ve tried BIOS reset and “Clear key database” without success, this is likely a firmware-level issue. HP’s BIOS may not restore default Secure Boot keys automatically.
A few options:
- Check for BIOS/UEFI updates from HP.
- Manually enroll keys if your BIOS supports it (Microsoft
PK,KEK,dbor Linuxshim/MOK). - Contact HP support, as some All-in-One models have firmware limitations.
Windows alone cannot restore Secure Boot keys. Multi-boot setups increase the risk of EFI key corruption, so any fix needs to be at the firmware level.