olHip :
I have one question and that is are there any secure OS's on the market at all?
None of them, or all of them.
You could deploy the most locked down Linux variant, but with a bad user, it too will be compromised.
Similarly, you could use any thing, and with a competent user...no problems at all.
The most secure OS is one installed on a PC with no internet connection, no USB ports, no DVD drive, no floppy drives, and a broken power switch.