Yellow Triangle Exlamation on System Restore C Drive

System Protection and System Image Backups both rely on the same Volume Shadow Copy Service (VSS) storage space, they end up fighting for disk capacity. System Image backups are massive and will aggressively purge older shadow copies (like previous file versions and restore points) to free up space. 

When you enable System Protection on a drive storing these backups, you trigger an operating system warning about this conflict. Both features require allocated VSS space, resulting in Rapid Deletion. Because space is limited, the VSS service deletes older shadow copies much faster than normal to ensure there is enough storage capacity for new System Image backups

try disable System Protection (System Restore) in Windows, open your Windows Search Bar and search for advanced system settings. Click on System Protection, select your drive (usually C:), click Configure, choose Disable system protection, and click Apply.

alternatively, try turn off Windows System Image backups, Open the Control Panel, select System and Security > Backup and Restore (Windows 7), and click Turn off to stop further automated images from saving to your drives.  

@redxps630​  Thank you for your reply. I appreciate it.  I don't want to disable System Restore. I want to have it in case I need to restore windows. Also I check the Backup & Restore(Windows 7) and it shows Windows Backup has not been set up. So, thank you again for your suggestions. I'll keep researching.  Have a great night.

Hi

I had a daft thought....

If you keep having backup/restore points every 2 days, you will need the restore point all the quicker as the "disk" wears itself out/corrupts itself and then fails.