Unfortunately we are still stuck with applying this upgrade. Went as far as assigning explicit end-user full permissions directly to both the local workstation folder to where the upgrade files are unpacked as well as ensuring the end-user has full control permissions explicitly assigned to the required folders on the server as well. Still all to no avail. We then went as far as using our Domain Admin level account, which has full access to everything be it workstation or server, and the issue remains with an identical error message. Have not gone as far as disabling the local workstation firewall or avast! antivirus as we've never had to do this in the past. Any further suggestions?

Thank you