Tools in the Arctoolbox are not working after double clicked on it. No dialog box is opening. I saw my suggestions to delete "Normal.mxd" file.
But I was unable to find that file anywhere in my laptop.
I'm using ArcGIS version 10.5 in windows 10...
normal.mxt resetting your application profile
https://community.esri.com/docs/DOC-2121-resetting-your-arcgis-application-profile