I will start with explaining the rough set up and the issues we are having, but if there is anymore information you need to know to help me fix this problem please feel free to ask. This summer we are planning to re-deploy images to all our PC's due to these issues we have been through. Our computers have picked up ACL issues, these stop us creating scheduled tasks, and prevent applications with services/registry installs/changes from installing. We are running all our servers on Server 2003, one of which is Server 2003 x64. We are running all of our computers on Windows XP Professional, most of which are running on SP3.We have had a Server 2008 on the domain but as the majority of staff have not had much experience with it, we have reverted back to Server 2003. Our PDC was replicated, but the Server with the global catalog crashed and we have not been able to recover this server, therefore we could not demote it, but we have now enabled the Global Catalog on our PDC. The active directory has been replicated 5 or 6 times to now be established on its current Server 2003 x64 OS. I have a laptop which has Windows XP Professional SP3 on which has been connected to the network, but never added to the domain, as far as i am aware, it has had no ACL issues. Which leads me to believe it is our Domain causing the problem. We created a script which resets the Access Control Lists, which seems to work for a few hours (allows schedules tasks to be created etc) but the ACL's seem to break themselves again. Has anyone come across this problem before, or do you have any ideas/suggestions on what to do to fix this problem. We do not want to re-deploy the entire networks' nodes only to find this error re-occurs. Thanking you in advance. Kevin