Windows 10: Windows 10 boot drive letter changed. Won't boot

Out of no where my windows 10 PC will not boot. After the windows logo it goes to a black screen with spinning dots. It will not boot in to safe mode. I booted to recovery tried startup repair (fails), tried reset this PC (fails). I opened a command prompt. Used diskpart and noticed my main hard drive had changed to drive letter E:\ . It seems my only option is to reinstall windows. Is there no way to change the drive letter back to C:\ ?

:)

 

Windows 10 boot drive

Is Windows 10 also limited to a max of 3Tb for a boot drive?

 

Swapping drive letters, including boot volume

I have a new computer. I want to clone the system to a new SSD. Can I change the drive letter of the SSD to C: after cloning?

I have a new ASUS M52BC with:

• 1 TB hard drive with a Windows (C and empty data (D partition
• Windows 8.1 (I will upgrade to Windows 10 very soon) on the hard drive
• Samsung SSD 850 EVO (physically installed but nothing more done to it)

What I want to get to is:

• 1 TB hard drive with the data (D partition and (for the old Windows partition) the drive letter of the C: changed to something else
• Windows 10 on the SSD as the C:

I don't intend to boot to Windows on the hard drive after I get Windows working on the SSD unless I need to remove the SSD for return to ASUS for repair. (My new computer had a bad motherboard when I received it but I hope I do not need to return it again.)

I want to clone Windows to the SSD using the Samsung Data Migration tool. During the clone, the SSD will of course not have the drive letter "C". To boot from and use the SSD after the cloning, it must have the drive letter "C", correct? I assume the Data
Migration tool cannot change the drive letter used by the software it clones.

After the clone, how do I swap the drive letters? I assume I cannot change the drive letter of the hard drive Windows partition when it was used to boot from because it would be the boot drive, correct?

I know that some people will suggest that I do a fresh install. I want to avoid doing that if possible.

I see
Migrate system partition to a new disk. I think that describes doing what I am trying to do, but unfortunately he does not know how he did it.

 

Windows 10 boot drive

Why do u even want a HDD/SSD that's 3TB for a operation system?