I am doing a Unity upgrade from version 2.4.0.120 to 2.4.6. I am trying to apply Exchange Service Pack 4 and I keep getting a bunch of errors stating, "Could not open the file named c:\exchsrvr\bin\address.dll. It is in use by another application". This is not the only file that errors out, there are many more. Any ideas?<br><br>David Plank<br><br>