ArcMap starts splash screen and goes to Loading Document then fails

Question

I am running Windows 7 and ArcGIS 10.4.1    ArcMap was working fine but now when I try to start ArcMap the splash screen pops up and goes to Loading Document then disappears.  I found some info relating this to the version of Python but I don't know how to tell which version of Python I am using with ArcMap.

Any ideas to solve or at least troubleshoot the problem?

RickCheney · Accepted Answer

Thank you!  I could not find the files listed at the link.  I went to Windows control panel and Programs and Features and selected ArcGIS 10.4.1 for Desktop and clicked Uninstall and then selected Modify, I selected Python and something like this feature not available (or whatever), which uninstalled only the Python part of ArcGIS.  Then, I restarted the computer, went back to control panel, programs and features, selected ArcGIS again and modify and this time I selected Python and the option to make it available all the time (something like Run from this computer).  Restarted the computer again and ArcMap started normally.