Try and update your Windows to the latest version.
And make sure that Corona.dlr-dlt are not in C:\Program Files\Autodesk\3ds Max 20**\Plugins. Remove anything from C:\Users\_username_\AppData\Local\CoronaRenderer that is corona related. Perform a full uninstall of Corona through your control panel add/remove programs, make sure Corona is completely uninstalled from your system and no Corona Renderer files are present in C:/Program Files, no Corona related files in C:\Program Files\Autodesk\3ds Max 20**\Plugins and in C:\Program Files\Autodesk\3ds Max 20**\scripts, also C:\Program Files\Autodesk\3ds Max 20**\scripts\Startup Please take the time and try the following: