This worked for me recently, using the precompiled version (get the win32.vc16.exe file):
To be on the safe side, install ROOT on a simple path with no spaces, e.g. c:\root62400
This worked for me recently, using the precompiled version (get the win32.vc16.exe file):
To be on the safe side, install ROOT on a simple path with no spaces, e.g. c:\root62400