: Look for the official website of Covadis or its authorized resellers. They should provide a safe and legal way to purchase and download Covadis 16.
To run this combination smoothly, your hardware should meet these minimum benchmarks: System requirements for AutoCAD 2018 - Autodesk
: 1 GHz or faster (2.5–2.9 GHz recommended for better performance).
: While Autodesk primarily promotes its latest versions, you can still access AutoCAD 2018 if you have an active subscription or an Autodesk Education plan .