I'm going through the solidworks introductory tutorial. I selected a part from 3d content central, clicked "Configure and Download", unchecked the "zipped" option, then clicked download. When the box popped up with the link to the part I tried drag and dropping the part into solidworks. I got following error in solidworks:
swShellFileManager:
An error was encountered while trying to open your file. Contact Technical Support for a possible solution.
Had the same problem if I clicked the link and tried opening the file with the Solidworks launcher.
Check the SOLIDWORKS version of the file being downloaded vs version of SOLIDWORKS installed on your machine.