Which Windows operating systems are supported in Digi ESP for NET+OS 7.5?

NET+OS 7.5 supports the following Microsoft operating systems:
- Microsoft Windows XP (32-bit)
- Microsoft Windows Vista (32-bit)
- Microsoft Windows 7 (32-bit)

Windows 10 is not officially supported. It works in 99.9% of the setups but some setups have some issues due to compatibility with cygwin version used by NET+OS.  Sometimes the issue is resolved if you run NET+OS installer as user "administrator".  You will need to  change preferences of the Digi ESP to "Run as administrator". 
If this does not help change properties of:
/cygdrive/C/cygwin420/bin/mkdir
/cygdrive/C/cygwin420/bin/rm
to "Run as administrator".
If it still does not work on Windows 10 try to do a clean uninstall and reinstall of Digi ESP. You can also try to run the program in Windows 7 or XP compatibility mode or use a supported Windows version.