Cloned SSD Will Not Boot - Inaccessible Boot Drive

[WAWood]

@ber999 

You change the PC mode from BIOS to UEFI in the BIOS settings -- which you generally access by pressing F10 repeatedly when you reboot the PC.

I'm not able to forward your thread to other folks, and we do not have specialists with equipment -- we all work from home remotely.

We're not HP Tech Support; instead, we're a bunch of volunteers contributing to the community forums.

[ber999]

Hi WAWood,
thank you very much. However, there is no setting for changing PC mode from BIOS to UEFI in the BIOS settings. Please have look to the HP Notebook PCs BIOS Setup Information and Menu Options below.

HP Notebook PCs BIOS Setup Information and Menu Options

Main menu: Lists general BIOS-related system information, computer model and serial numbers, and a system log.

System Time

System Date

Product Name

Product Number

System Board ID

Born On Date

Processor Type

Total Memory

BIOS Version

BIOS Vendor

Serial Number

UUID Number

System Board CT Number

Factory Installed OS

Primary Battery SN

System Log

Build ID

Feature Byte

Security menu: Set an admin password, review Trusted Platform Module (TPM) settings, and restore security settings to defaults.

Administrator Password

Power-On Password

Intel Software Guard Extensions (SGX)

TPM Device

TPM State

Clear TPM

Restore Security settings to Factory Defaults

System Configuration menu: Change computer and BIOS settings, including disabling the fn key, secure boot options, and enabling Virtualization Technology.

Language

Virtualization Technology

Fan Always On

Action Keys Mode

USB Charging

Battery Remaining Time

F5 LED

Audio DSP

Boot Options

Post Hotkey Delay (Sec)

USB Boot

Network Boot

Network Boot Protocol

Legacy Support

Secure Boot

Platform Key

Pending Action

Clear All Secure Boot Keys

UEFI Boot Order

OS Boot Manager

USB Diskette on Key/USB Hard Disk

USB CD/DVD ROM Drive

Network Adapter

Legacy Boot Order

OS Boot Manager

Notebook Hard Drive

USB Diskette on Key/USB Hard Disk

USB CD/DVD ROM Drive

USB Network Adapter

Network Adapter

Exit menu: Select how to save configuration settings, or load default setup values.

Exit Saving Changes

Exit Discarding Changes

Load Setup Defaults

[WAWood]

@ber999 

Well, then you're stuck.  While Windows 10 has NVMe drivers and can use NMVe drives even if they are not formatted GPT, in order to BOOT from them and use them as OS drives, they have to be formatted GPT and your PC has to be able to boot in UEFI mode.  If you can not do that, you can not use the NVME drive as an OS drive.