Right-click on the (or the ArtCAMPro.exe file inside the Exec folder). Select Properties . Navigate to the Compatibility tab.
: Ensure ArtCAM is set to "Run as Administrator" and compatibility mode for "Windows XP (Service Pack 3)" via the desktop shortcut properties.
. Autodesk eventually discontinued ArtCAM in 2018, so official support for version 8.1 is no longer available. Are you seeing a specific error code or message when you try to run the software?