The session setup from the computer %computername% failed to authenticate.

I've been seeing this error come through on my Domain Controller System Event logs for some time now and finally figured out what the cause is. The Error is System Even ID: 5805

Event Type: Error
Event Source: NETLOGON
Event Category: None
Event ID: 5805
Date: 3/30/2008
Time: 10:16:24 PM
User: N/A
Computer: DC1
Description:
The session setup from the computer %computername% failed to authenticate.
The following error occurred:
Access is denied.

My Computers that are connecting to the Domain are Lab Computers for Student Computer Labs. We use a product called Deepfreeze with restores the computers to the last frozen state on every reboot. The one problem with using DeepFreeze and having the computers on the domain is that when the computers try to to a domain machine account password change they will forget the new password after a reboot. Now the computer won't login to the domain or setup a session. I fixed this by adding a group policy to all the Frozen Lab Computers that disables machine account password changes:

It's under Computer Configuration -> Windows Settings -> Security Settings -> Local Policies/Security Options -> Domain Member: Domain Member: Disableachine account password changes