I am going slightly mad here.
At least 10 times a day I get the following errors on 1 of my XP workstations :
Source : Userenv
Event ID : 1030
Windows cannot query for the list of Group Policy objects. A message that describes the reason for this was previously logged by the policy engine.
Source : LSASRV
Event ID : 40961
The Security System could not establish a secured connection with the server ldap/myserver.mydomain.local/[email protected] No authentication protocol was available.
I have tried many things I read at eventid.net, I even reinstalled the PC and the errors came back after 3 days.