Cygwin emacs-w32 with Administrator privileges
With modern Windows privileges schema (unlike in Windows XP) Emacs can't save edits to many files
placed in special directories (like "Program Files"). To allow saving of modification you should
grand Administrator privileges to Emacs process.
Emacs 25 under Windows
I haven't used Windows for a long time and my new job may require Windows environment. So I checked
out new ways to use Emacs under Windows.