I am trying to get Orchard up in running in:
Visual Studio Express 2013 (freshly installed)
Windows 8.1 (though I had the same problems in 8).
When I launch the "Orchard.sln" file from within the
folder, it seems like MS Studio is working on something, but then all of the modules are "unavailable."
I was unadvised to uninstall studio and start again, which I did, to no avail. Sorry, it's a basic one I'm sure...