Swapping SSDs

Things to consider:

The chances of successfully transplanting a drive and having it boot on first powerup are low, so do not try before you make and verify a full system (preferably image) backup of the drive.

Even if the drive does successfully boot, Windows will need to be re-activated, which will require contacting Microsoft (probably by phone).  Since what you want to do is a violation of the end-user Windows license, they may well deny the request.

If the systems are different, the Intel RAID controllers may differ, which could require you to boot in safe mode and install the drivers for the newer system.  On most new Dell systems, there is no way to disable Intel RAID/RST.  Depending on the age of the HP system, it may be possible the drive is set up in ACHI mode -- which new Dell system won't have.

Beyond that, you will also want to retain the original drive in the new system intact, as Dell will require it in case support is needed -- they will deny support for a system where you've changed the boot drive.

@ejn63​ Have you tried using macrium reflect to avoid the need for a new installation?

I use it all the time for backups and recovery.  That said, its role isn't to avoid the new installation -- I think that's inevitable in your case unless the hardware in the two systems is very close in age, and you're willing to plead your case to Microsoft.

Macrium backup will allow you multiple chances to to try the swap, that's all - it's not going to improve your chances of taking a foreign Windows install from one set of hardware to another.

@ejn63​ I think the hardwares are pretty close in age as they were made within a year of each other

Additional Context:
Old HP:

UEFI + Secure Boot is ON
 •boot entry is Windows Boot Manager 
SSD
 • ~931.5GB, NVMe over PCIe, Non-RAID.
 3. storage stack is Intel RST / VMD-based
 • BIOS shows Intel(R) RST VMD Driver and an Intel Rapid Storage Technology menu.

New Dell:

 SATA/NVMe Operation:

 BIOS settings are already set to AHCI/NVMe

Boot Sequence:

 Boot Mode: UEFI only and Windows Boot Manager is listed

You can't drop in a drive running in IRST mode to a system in AHCI mode -- at least not without altering the Windows boot loader.

As for the rest, it's try it and see (you'll need to call Microsoft as Windows will need to be reactivated once you swap the drive).

@ejn63​ I was able to start the computer up directly. I kept the dell in AHCI mode and the only issue I had at startup was that it required me to sign into my Microsoft account and the only Wi-Fi option was airplane mode and none of the networks available were displayed, so I had to connect my phone to the laptop and turn on my phones hotspot and allow the hotspot to be used through the USB cord after that only other thing I need to do after signing in was down the Dell drivers from the website