Your client does not support opening this list with Windows Explorer

You’re not supposed to see the above error message unless you’re browsing your SharePoint site from a server, using XP SP2, Vista or IE6.

If you’re on Windows 7 and SharePoint 2010 like me and you get this then you have a problem with your connection to the server, probably at the authentication layer.

The easiest way to fix it is:

  • Click Start
  • Right-Click ‘Computer’
  • Select ‘Manage’
  • Expand ‘Services & Applications’
  • Click ‘Services’
  • Find WebClient and restart.
If it works after that then it’s just a hiccup.  If it still won’t work you need to start googling for WebDAV ports and suchlike.