devl version 2.7.27-4 windows - install problem details

[coralline algae]

I tried to reinstall the devl version for windows again and looked closely at the detailed messages.  The problem seems to occur during the installation with a copy operation for gs.exe which fails.  Soon after guile.exe is called and the error message pop up appears 

guile.exe has encountered a problem and needs to close
we are sorry for the inconvenience



Copy to C:\tool\audio\LilyPond\usr\bin\lilypad-unicode.exe
Copy to C:\tool\audio\LilyPond\usr\bin\gs.exe
Copy failed
Copy to C:\tool\audio\LilyPond\usr\etc\fonts\fonts.conf.in
Execute: "C:\tool\audio\LilyPond\usr\bin\guile" -e main -s "C:\tool\audio\LilyPond\usr\bin\fc-cache.scm" "C:\WINDOWS\fonts" "C:\tool\audio\LilyPond\usr\share\gs\fonts" "C:\tool\audio\LilyPond\usr\share\lilypond\2.7.27\fonts\type1