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.