I do not need a solution (just sharing information)
When using the right-click wizard in the event viewer to add an appliction to the whitelist under "application rules", the policy fails with the error: Driver failed to load new policy: Error adding sigflags
When adding an application using the wizard, the signature flag "signed and trusted" is set for each application path.
The issue seems that for some reason, this flag is set incorrectly, and the policy will fail to load with the error (Driver failed to load new policy: Error adding sigflags)
The solution is to remove the flag, save the policy and then re-set the flag.
Now the policy will load without any issue.
It took me a week to figure out that this was the problem, and I wanted to share the solution. Good luck out there!
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