Revit MEP 2010 Windows Installer asking for installation media disk 1

When the user gets the prompt to browse for the source for the installer (1st message) have them browse to the following location on the installation media:

“\Autodesk\RME_2010_English_Win_64bit\RevitSetup\RevitMEP”

If that does not work, browse to “\Autodesk\RME_2010_English_Win_64bit\msi” instead.
That should enable the user to go through the installation/repair process.
If that does not fix the issue, I suggest going through the process to cleanly uninstall and reinstall Revit found below:

click for clean uninstall Revit MEP 2010