Bitlocker waiting for activation

This morning I couldn’t unlock may laptop with CTRL+ALT+DEL, I had to do a hard reset.

After hard reset I ran these commands:

DISM.exe /Online /Cleanup-image /Restorehealth

and

sfc /scannow

Later today, in File Explorer, I saw yellow triangles with exclamation marks on some of my partitions.

The reason: Bitlocker isn’t activated on these partitions..

Control panel looks like this:

On the “DATA_M.2 (H:)” partition I’m currently running “manage-bde H: -off” in an elevated command prompt.

Before execution of that command, “DATA_M.2 (H:)” also had the comment “Bitlocker waiting for activation”

I don’t want Bitlocker.
I have never activated Bitlocker on this laptop.

I probably have to turn off Bitlocker on (E:) and (F:) as well because these are other Windows OS’s and if OS on (C:) encrypts the OS’s on (E:) and (F:) these OS’s won’t boot up right?

There is also a Powershell command to turn off Bitlocker:
PS C:\> Suspend-BitLocker -MountPoint "C:" -RebootCount 0

I found it here:
https://learn.microsoft.com/en-us/powershell/module/bitlocker/suspend-bitlocker?view=windowsserver2025-ps

Is there anyone who can say if the PS command is any faster than the CMD-command?
The CMD command has been running for hours, and there is no progress indicator.

Can I use the laptop when the command runs?
What happens if I restart Windows, will Bitlocker Decrypting resume automatically?

Why is this Bitlocker encryption enforced by Microsoft without letting me know first so I can decide if I want it or not?