Windows 10

[dave.king1]

I think these are the reasons why the worlds best computers (think super-computers, military's, stock exchanges etc.) run Linux and not Windows or Apple. So there are other options out there that are high quality, if you continue to beat your head against a wall with the two major players.

Cisco telephony and networking solutions typically run Redhat Linux and so does the equivalent Alcatel kit.
( at least it did when I retired in mid 2014 )