SolidWorks 2016 was never officially supported on Windows 11. It was designed for Windows 7 and 8.1, with limited support for early versions of Windows 10. Using an "activator" to force it onto Windows 11 often leads to:

Alex yanked the laptop’s power cord, held down the power button until the screen went black. His heart hammered. He counted to ten, then booted into Safe Mode with Networking.

Before running the activator or the software, right-click the setup file or the desktop shortcut: Go to > Compatibility .