The issue appears to be related to Windows updates KB3000850 and KB299261. We will try to resolve the issue without uninstalling the updates, and if that doesn’t help, we’ll uninstall the updates as it seems to be a sure workaround for this issue.

Solution 1: Set the value of the ProtectionPolicy registry entry to enable local backup of the MasterKey

To address this problem we need to edit a registry entry to enable local backup of the MasterKey instead of requiring a RWDC. To do this:

Solution 2: Uninstalling the updates KB2992611 and KB3000850

Since the problem revolves around the Microsoft updates KB2992611 and KB3000850, if Solution 1 does not help, we can uninstall these updates and prevent them from being reinstalled automatically. The following steps instruct us on how to proceed with the process:

How to Fix Credential Manager Error 0x80090345 - 15