Windows 10: Problem with VSS system restore and chkdsk without reboot fails

Hello. Windows version is Windows 10 Professional 21H1 build 19043.1165 with latest updates. The volume is BitLocker encrypted. Yesterday just navigating through tabs on System Properties dialog, I occasionally found out that System Restore fails to launch with error 0x81000203: Open tab in English probably is "System protection". I tried to boot in safe mode booted OK, and launch System Restore but it also don't works. Next i have found that disk checking utility is not starting normally but is starting at boot if to schedule a disk check: It says that failed to check the disk and offers

:)

 

VSS / System Restore Points not working

I tried to run Casper 10 Backup yesterday and it returned errors about VSS timeouts. Since then, I have been trying everything I can think of to get it working, but nothing has worked. Also, in the process, I discovered that although system protection is switched on for my C drive, if I try to create a restore point, the create dialogue just stays on screen but nothing else happens (I eventually have to use Task Manager to shut it down). Also, VSS says that it is running in the services list, as are the two other services it depends on. This is what I have tried so far:-

1. Running repairs using the tweaking.com repair tool.
2. Using DISM.
3. Tried a different disc image backup program (Active Disk Image) - that also fails.
4. Tried running a backup in safe mode - that also fails.
5. Tried running with a clean boot - that also fails.
6. Tried switching off and on system protection - restore point still fails to create.
7. Tried turning off my (Webroot) antivirus - backup still fails, as does restore point creation.

I don't know whether this is just a coincidence or not, but I only noticed these problems after trying the new Acronis True Image 2017 program (but that was backing up to the cloud, so maybe that's why that didn't throw up any errors). I don't know what else to try.

 

VSS / System Restore Points not working

There are some registry tweaks suggested on the Macrium site which show how to delete things left behind by Acronis to make Macrium (and also I think System Restore) work - my first question would be whether there is a Registry entry at
Code:

VSS fails due to modification by 3rd party software - KnowledgeBase - Macrium Reflect Knowledgebase

Although I wouldn't go deleting Registry keys just yet.

Also, does this help? It's about an older version of Acronis but may give you somewhere to look? And it may help to allow Acronis to coexist.
Acronis Backup: Using Microsoft VSS instead of Acronis VSS | Knowledge Base

 

Failed to Create Volume Snapshot Macrium Error 0x8004230f VSS Error

Hi, you might try this:
Microsoft Volume Shadow Copy (VSS) Troubleshooting - Microsoft Volume Shadow Copy (VSS) Troubleshooting

or the free cautious repair tool
Tweaking.com - Windows Repair Free/Pro
- observing the steps and using only the relevant repairs

More:
How to Fix VSS Errors Step-by-Step

Otherwise I suggest- assuming your disk and file system are sound-
an in-place upgrade repair install which keeps all progs, data and most settings

You need an iso of the same base language and build- freely downloadable.