If doing a Repair Install, when you read the link in Post #2 and scrolled down to Step #13 You have the option to Reinstall Keeping Files. (ie) all User files, Games saves, Installed 3rd party apps...

The appdata folder needs to be on the C: drive. You can move Microsoft Apps to a different drive, but none of this is recommended.
I would try a System Restore to a time before you attempted this.
...

Press the Windows key +X and choose Disk Management. In the lower pane Please attach a screenshot of this. So we can see your storage options.

Follow the instructions in this link to determine why the computer shut down
How to find out why your PC shut down for no reason on Windows 10 and 11 | Windows Central

You can sign into Office 365 with your Microsoft account while you are logged in with a Local Account

Why do you want o Install Windows 7 to upgrade to Windows 10? There is no direct update path any longer.

How did you copy it? did you make a clone of it using Easeus?

Bottom line is your...

If you don't use it, you can always Uninstall OneDrive
Uninstall OneDrive in Windows 10

If it would have said that it could not repair these files, then from a Command Prompt run as Admin and Copy and Paste or type
DISM /Online /CLEANUP-IMAGE /RestoreHealth pressing Enter
When that...

Glad you learned a few things.
You can of course now do a Clean Install on that drive.
I would disconnect any other drives with Windows on it, other than the one you working on, so as it doesn't...

Please fill out the My Computer section of your Profile on this forum so we don't have to ask.
What is the Make and Model # of your motherboard or computer?
If this is a desktop PC, Open the side...

Glad you got it sorted

Or you can use this Free Online .DAT file converter.
Convert files from and to DAT format online - AnyConv

See if there is any help here
Get community support | Thunderbird Help

If not post in this forum for better results

Open the Read Me file in your Zip file,. and make sure you are following the first 4 steps.
That the files have been extracted to the Root of the of the drive (ie) C:\ and you are running the...

You can also download VLC Player which plays just about any Media Files, including DVD files without having to download any Codecs.

The CMOS battery would not have been the problem. The Bios could have changed from a improper shut down or an Update
Glad you got it sorted,

We don't suggest using OneDrive, but if you want to...

You cannot move a OneDrive folder like Documents to another drive.
You can move the C:\Users\UserName folders to the D: drive, As stated above

But To add to what is being said.
On the D:\Drive,...

First see if this helps: https://learn.microsoft.com/en-us/troubleshoot/windows-client/performance/event-id-41-restart

Also, try running in a Clean Boot. If this works, you can keep it this way,...

Now that the Partition scheme is correct for Disk #2 put it back in the troubled computer and try to boot to it.
If that is successful, you can start a Command Prompt as Admin and run
SFC /scannow...

The SFC command is run in Offline Mode and is correct it is Not Wrong, if you are in the Windows Recovery Environment. And you are not in Windows and booting to the Troubleshooting menu.

If you...

Since your USB Flash Drive is working, there is no problem with your USB Ports.

You say you are using a USB mouse, but then you say you tried a Wired mouse? Is this USB I presume? Does this mean...

The picture in Post #6 shows Disk 3 which includes the G:\System drive, shows incorrect Hidden Partitions for a GPT Initialized drive. (ie) no 100MB FAT32 EFI partition.
However the latest picture...

When your finger accidentally slips, it can move a file into another nearby folder, it has not vanished. this is Human Error.
As stated, if you accidentally deleted it, it would be in the Recycle...

You have to check the Health of the Drive, it may be starting to fail. As stated, you can download Crystal Disk Info and/or DiskGenius in my signature. View the SMART Info, if the Health is any less...

In the Recovery Environment, the command for SFC is different then those that are run within Windows.
As stated, you would only run these commands if the Drive was healthy. It sounds like the drive...