Reason doesn't launch. Instead, a Windows Installer window pops up and tries to install something. What's up?

If Reason doesn't start up during launch and it looks like in the picture below, it's probably because the Windows Installer is trying to download/update your ASIO audio driver(s).

Try this:

1. Shut down Reason.
2. Uninstall your ASIO driver(s).
3. Launch Reason. If this works, shut down Reason and update and install your ASIO drivers.