Windows 10: System Restore shows a missing C: drive

W10 Pro 20H2. Went to create a restore point and noticed something amiss. No clue as what this is about. Any help is appreciated in advance. See red notation here:

:)

 

Windows 10 System Restore Show More Restore Points Box Missing and Restore Points Being Deleted or Missing

Hi Steven,

There are several reasons why the Show more restore points check box is missing. Some of these are the following:

• You run out of disk space on the system drive or on any one of the available non-system drives, and System Restore stops responding and stops monitoring your system.
• You manually turn System Restore off.
• You upgrade from one operating system to another or you reinstall the operating system

In your case, as you have reinstalled Windows, it's possible that all restore points are deleted, that's why the
Show more restore points check box is not appearing. Did you delete all the partitions when you reinstall Windows? If yes, then all the manually and automatically created restore points will disappear. For further isolation of the issue, we suggest that
you create a new restore point and monitor if it will disappear in a few days just like the others.

We'll wait for your response.

 

system restore cannot find c drive is missing in Windows 10

I do regular backups with acronis just found out that system restore was turned off I tuned it on done a manual create restore point cheched the configuration and saw local disk c is system turned on under that c drive is missing the restore point I created
seems to be ok what does c drive missing mean

 

How to delete inactive System Image Restore Points in System Restore

Windows 10 64-bit.
When I click "show more restore points" in System Restore I see a bunch of old "system image restore points" that were deleted in past and do not correspond to any currently active restore points. Clicking any of these old restore points, I simply get an error message saying they could not be found, and to select another restore point instead.I would like to delete these restore points listings but have been unable to do so.
So far, I have tried steps mentioned below without any luck :

Disk Cleanup through (C Properties
Disable System Protection (OFF and ON) in System Protection for OS (C
Disk Space Usage to minimum (slider button all the way to the left then 'Delete all restore points for this drive'),
Delete all shown Restore points in CCleaner (the problem ones do not show here),
Reset Windows Backup to Default in Windows 10 with 'Reset_Windows_Backup.bat' utility.

Any suggestions highly welcome.