We are experiencing a lot of disconnections problem with our network drives. Different versions of windows 7 (professional, business, ultimate) are experiencing this issue at random interval. All our mapped drives are local on servers operating under windows 2008 or 2003. Theses map drives are connected through logon scripts. When this problem occur, if we try to access the files with a shortcut, it will open and list the folder content but we can't access office files when pdf files will work. For example, if I open a word document, word will launch and will try to load the file without success displaying a loading bar in the middle of the bottom of the window and will ultimately end up with an error after a long waiting time.