I’ve had a few questions on this one. So if you can’t get the workflow running in the Refresh 4 VM you should turn off the SSL support for the workflow website.
This video walks through the quick change needed.
You can download the video from here.
Here are the basic setups.
Go into IIS
Locate the workflow website and double click on the SSL Settings
Un check the option for Require SSL support.
Then click apply from the Actions panel.
(Original post at http://blogs.msdn.com/lcash)