From: RayRedSoxFan on
About every hour and a half, I get the following error in my "System" Event

The kerberos subsystem encountered a PAC verification failure. This
indicates that the PAC from the client %1 in realm %2 had a PAC which failed
to verify or was modified. Contact your system administrator.

I have no idea what this means or why this is happening. Can someone explain
to me in relatively plain english what this means and what I can do to
resolve this? Thanks