I'm trying to upgrade some PCs from ArcGIS for desktop 10.5.1 to 10.6 some PCs were upgraded successfully but some PCs Failed with an error , 1 PC has win 8.1 and 1 has win 7 SP1
Was beta version of any ArcGIS product installed in the machine?
e.g. Problem: ArcMap 10.4 (Prerelease or Final) won't run if installed after ArcGIS Earth 1.0 Beta
The tool did not work , is there any tool for arcmap repair ??
repairs are done through Windows Control Panel... Got to Add/Remove programs, start it, then you will be given the option to Repair... try it
installation is not complete in the first place and and when trying to repair the repair is not complete also and giving the above error during installation
if it is the windows 8.1 machine, make sure the 2017 patch is installed
http://desktop.arcgis.com/en/system-requirements/latest/arcgis-desktop-system-requirements.htm
You should actually run the link on that page (or here)
You could also try deleting that dll, then re-running the 10.6 setup. It's installed to "C:\Program Files (x86)\Common Files\ArcGIS\bin\ESRIRegistrationMgr.dll".