Solution for Windows:

Uninstall it. When the annoying window comes up, open task manager. Find the process labeled "Autodesk Genuine Service" on the task manager processes list. Right click it, and then open file location. That will take you right to where the Autodesk "Malware" is running from, and you can delete it. 

But...

It won't let you delete it while it's running, so you have to end the task from task manager and then quickly delete the folder before it automatically starts the program up again. 

Good luck, folks.