Cannot activate Product Design Suite Premium?
You receive an invalid serial number some days after activating Product Design Suite Premium. This situation is often noticeable when opening a suite point product which was previously working, for example, AutoCAD. It is likely that the trial version of the suite was initially installed which has a different product key, as it is the Ultimate version. The only solution is to uninstall the suite/s using the Autodesk Uninstall Tool.