Windows and Drive health (life)

Emco UnlockIT (free) is helpful, as it can handle both folders and files.
If necessary, it can automatically set up scheduled deletion of protected items on restart (i.e. when Windows isn't running, so no protection applies).

All done from Windows, no need to use a bootable disk - though that's another option of course.

Sammy888 said:

Yes. Lesson learned. I won't be using Fileshredder on NVMe drive in any case. But it was either that or reformat the drive.

Reformatting the NVMe drive won't fix that problem. That is on the memory chips itself.
You can remove the file then run TRIM. Optimize and Defrag Drives in Windows 10

Sammy888 said:

How is the single pass different from a standard delete? And what methods do you suggest to remove a file? Booting in safemode and as regular (myself Admin) and the separate Administrator profile didn't work.

Of course, I'd like to know how this happened in the first place, but removal is more important right now.

1. delete the file then use TRIM. Optimize and Defrag Drives in Windows 10
2. Using Linux live CD/USB terminal. rm "/mnt/sda1/PATH/OF/THE/FILE.txt"
3. Using WSL. rm "/mnt/c/PATH/OF/THE/FILE.txt" (Note: command parameters on WSL and Linux Live are different because of different mount points.)
4. Using PowerShell. Remove-Item "C:\PATH\OF\THE\FILE.txt" -Force
5. Using CMD. del "C:\PATH\OF\THE\FILE.txt"

If you can't delete it:
1. Select the Continue with the Administrator icon. TRIM requires Administrative Previliges.
2. Use sudo rm instead of rm
3. Same as 2. (Use sudo rm instead of rm) Run WSL as admin.
4. Run PowerShell as Admin.
5. Same as 4. (Run CMD as Admin.)

Notes for some of it:
2. You need an Linux Live CD or USB for this to work.
3. You need to Enable WSL, download and run your specified distro. Enable or Disable Windows Subsystem for Linux WSL in Windows 10

Screenshot if possible the results.