We had ArcGIS Desktop 10.3.1 installed on Windows 7 machines. The machines were upgraded to Windows 10 (64 bit). Now many of the old MXD's created prior to the upgrade will not open and crashes ArcMap.
User is starting on the MXD by double clicking. The same MXD can be opened on machines that have Windows 10,.but had ArcGIS Desktop 10.3.1 installed 'after' the upgrade.
Ideas are welcome.