If you must run Version 8.5, do not install it on your primary, internet-connected office PC. Set up a dedicated, offline workstation running native Windows XP or Windows 7. Keep this machine completely disconnected from the internet to protect it from modern security threats that target unpatched, legacy operating systems. Upgrade to a Modern Version of CNCKad
Many users looking for this specific legacy version of the Metalix sheet metal CAD/CAM software are trying to maintain older CNC machinery. However, downloading software from unauthorized third-party sources presents severe dangers. cnckad 2006 85 full link