You are happy working in SharePoint, creating document libraries and new pages with riveting content, when you decide you’d like to open up a library in Explorer view and blamo!
There are various theories on this problem, but for me, the solution was to activate the “Desktop Experience” feature from Server Manager. My development environment is on Windows Server 2008 Standard and SharePoint 2010.
Open Server Manager, Add a Feature:
Select Desktop Experience:
Reboot the server and you should be able to open from the File Explorer until the cows come home: