Windows 10: C: drive went from being numbered as Disk 0 to Disk 2 ???

Greetings,

My week-long expedition into trying to discover a fix started with my C: drive shooting up to 100% activity, and Windows hanging/frozen/useless. Nothing worked, not even the mouse. This was ver. 1809 with a couple of updates (Jan 2nd and Jan 4th?) uninstalled.

I researched a lot, read about many Event Viewer notices, fixed some, and basically tried to determine what made sense and was safe, and did too many things to list.

At one point, after installing Advanced SystemCare 13 Pro (paid), and letting it tweak everything, well, I noticed that my C: drive went from being numbered as Disk 0 to Disk 2. I was not positive the ASC made this terrible change, or not. After hearing back from an ASC mod, I am assured that ASC did not make that change.

Anyway, this renumbering rendered System Restore useless (or maybe I accidentally deleted some restore points with some other cleanup routine - user error is always a possibility - lol). I was also unable to get past the twirling marbles circle on the black screen. Windows was a no-go zone ... until I restored my C: drive (thank goodness) with Acronis 2020.

The computer now seems to be acting like a computer.

Restoring C: got me back in the game. All my other drives are fine. I updated to build 1903 yesterday. I turned the Indexing service back on and let it run. All appears to be well, yet since the system hang was intermittent, I'll not be 'comfortable' until a few days pass.

I'd still like to understand how the drives got re-numbered so that I can avoid that in the future.

Advanced SystemCare or not, if anyone has any idea how a disk number could be changed, I'm all ears.

I'm sure to have more questions in the near future.

TIA



Win 10 home x64 ver 1903 build 18632.592. Yesterday I was on ver. 1809.

:)

 

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I need some advice on whether it is possible - and if yes, how to merge my C drive on disk 0 with D drive on disk 1.

The problem is: my C drive is getting full soon, but previously after I deleted D drive and make it unallocated space (the bar of current D drive will change to black from blue), I still cannot expand C drive by adding the 100GB unallocated space into it.
If I right click on C drive, the "expand" item is in gray.

I've searched online for solutions but so far only have seen same questions around. Does any one know the solution and do a big favor to explain how to do it step by step? Thanks much in advance!

P.S, sorry that the interface is not in English. Below page shows the "Disk Management" function, and you can see that:

1) Disk 0 has 55.78G, including C drive (55.21GB), 100MB of something I don't know what it is, and 473MB of recovery zone

2) Disk 1 has 100GB D drive, and 831.51GB E drive

 

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You cannot combine space from two separate physical disks. You have two choices:

1. Replace your C drive (disk 0) with a larger disk, or

2. Move some of the files from the C drive to a D drive on disk 1. Be very careful moving files from C to D; moving the wrong files can render your PC inoperable.