I have an Outlook PST file (528 MB) created in 2006 that is locked. The file is on a network, which I understand is not supported by MS, but that is where it is. I am unable to rename or copy the file. Outlook is not running. The machine has been restarted multiple times, attempted to copy or rename the file before doing anything else. I attempted to run SCANPST, received the same error. I attempted to run Unlocker, received the same error. I attempted to change owners and perms, successful, but received the same error. I attempted to use Outlook Recovery Tool as well as SyncBack, both failed, same error. I am working remotely on the issue, and the customer was unable to get the machine to start in Safe Mode, so that is out. Outlook is not running, it is not running is Processes in Task Manager. I turned off all extensions/add-ons as well. Also get the error: The process cannot access the file because another process has locked a portion of the file. This is a work stoppage for the customer, any direction would be much appreciated.