$ cron_diagnose.sh
This script did not find any errors in your crontab setup.
If you are still unable to get cron to work, then try
shutting down the cron service, uninstalling it,
reinstalling it, and restarting it.  The following commands
will do that:
  $ cygrunsrv --stop cron
  $ cygrunsrv --remove cron
  $ cygrunsrv --install cron -p /usr/sbin/cron -a -D
  $ cygrunsrv --start cron

If that does not fix the problem, then report your problem
to cygwin@cygwin.com.  Please include a copy of your crontab
('crontab -l') and the output of 'cygcheck -srv > cygcheck.txt'.
cygcheck.txt should be included *as an attachment*, NOT in the
body of the mail message.
$ cygrunsrv --stop cron
$ cygrunsrv --remove cron
$ cygrunsrv --install cron -p /usr/sbin/cron -a -D
$ cygrunsrv --start cron
cygrunsrv: Error starting a service: QueryServiceStatus:  Win32 error 1062:
The service has not been started.

$