Hi Goodnight, I need your assistance with fixing my hp windows 10 laptop because it's not booting up

[Evin242]

I tried restarting it but it's not working, I tried the command prompt nothing works, I tried resetting and keeping my data nothing works, and I also tried to restore it but it didn't work. I need your help with how to get it back to normal and still keep my data. Please answer to this message A.S.A.P.

[WAWood]

@Evin242 

This issue is often due to a failing drive. So, let's check that first, because if it is failing, it would need to be replaced and there is no point then in doing anything else until we confirm that.

If your PC is new enough to support UEFI, you can use these steps to test the hard drive: http://support.hp.com/us-en/document/c00439024

If not, to check the drive you have to follow these steps:
1) Press Esc key repeatedly, several times a second, while rebooting the laptop. Do NOT hold the key down, just press it over and over.
2) Eventually, you will see an HP Startup Menu
3) Press the Function key for testing the hard drive (usually F2) and let it run.

[WAWood]

@cashmere477 

That's most likely because a 2TB drive is generally formatted MBR, while a 4TB drive must be formatted GPT, and the second requires the PC to be using UEFI mode, not BIOS mode.  So the two are not interchangeable.