I had just finished installing SQL Server 2012 onto my W2012 server and suddenly all of my desktop icons vanished. I tried logging out and back in and the icons appeared but when I click on any of them I get the message "No such interface supported". I have had others user try to login and now they all have the same problem. I cannot even run Windows Explorer. Is there anything I can do? My thought now is to trash W2012 and go back to W2008R2. Any suggestions on how to get W2012 functional again?