Hidden Group Policy

At the medical center we force the screen saver to come on at a minimum
of 15 minutes and lock it to the password due to confidential patient
information displayed on the screen when nurses walk away from their

The problem I have is that the previous administrator seems to have
hidden a group policy somewhere that sets the screen saver to lockout at
5 minutes. This is not acceptable in a surgery environment.

Can someone tell me how to find hidden policies in order to disable or
reset them?

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