I used an app called "mint stick" or  "create live usb stick" which is part of Peppermint 7 and other distros.
With Ubuntu Mate 16.10 and every other distro I tested it, the installer works correct.

In the meanwhile I put whatOs R10 iso  on an usb-stick which has  multi-system installed on it.
http://liveusb.info/dotclear/index.php?pages/install
Strange enough. It installed without errors from the multi-system usb-stick. I am writing this posting from whatOS R10 .

Last time when I installed R10, I used the above mentioned create live usb stick  method and it worked.
It is a mystery which I cannot solve and since R10 is now installed, I forget about it and mark this thread as solved.

Dan,
thanks again. 

It works.

I have whatOS R10  with LXDE desktop.
Will put the info about it and my PC in my signature, but first have to find out how to get the essential facts.
I know there are terminal commands for it and I know that there are apps, but first have to find and install them.

Hello to all members here.

Finding wattOS was accidental while testing several linux distributions on a linuxmintuser-forum where somebody mentioned  Peppermint-7.

So I searched for that and in their forum somebody mentioned wattOS  ----> now I am here.

My experience with Linux is similar to many.
Used only Windows for years, never learned the details, only did what everybody seems to do: screening for Virus, installing Firewalls (Zone alarm etc), then buying or testing the next Internet-Security software and looking for free software, never sure if it crashes the system.

I didn't dare to touch Linux for a long time.
Then Windows-8 came and then Windows-10 and that pushed me to Linux.

When I did, I stumbled over LinuxMint, installed it on my PC ... and messed up because something went wrong with "Root" or something I didn't understand.

So I began searching for that mysterious thing like "mounting Root" and mounting "home" and after many hours or days of searching I found that it is  a  "/" for Root in the installer and  "/home" for the home partition.

So you get the impression of how some people crash against a wall when touching Linux for the first time.
I know for sure that I am not alone in this.
Some find the "/" faster , some give up and return to Windows.

In the meanwhile I installed LinuxMint with different Desktops.
 Elementary, Debian, Ubuntu, Peppermint-7, Sparky and others.

Some were way too complicated for me like Mageia etc. and I gave up after a few hours.
Some I liked and kept them a bit longer. 

Right now Peppermint-7 and wattOS R10 are my top distros.

I could list reasons but basically it's about speed on my old PC ( Dell Inspiron 560 ) and Toshiba-Satellite Laptop.

Speed and knowing how to add a quick-launch icon to the Panel. 

Fast booting  ( wattOS seems to be a few seconds faster than P-7 , it needs about 25 seconds until the login-screen appears and after login it loads the desktop very fast) and fast shutdown.

The browser should load fast and surfing smooth.  Firefox is good, but with the standard addons I have, it needs more time to start than Opera does, therefore Opera is my default browser now.

For germans who are not able to basically understand english language like I do, wattOS is certainly not the choice. Ubuntu or Linux Mint is because they have german forums.

My english is not the best, but somehow enough to understand instructions, so I can stay with wattOS and the fine support I see happening here in the forum. 

Maybe you consider it silly, but one reason I might stick to whatOS is this forum. 
It just loads and navigates much faster than the P-7-forum does.
Such a minor thing is important, believe me.

Anyway.

Thanks to the developers of whatOS and all who support it.
You have done and are doing a great job.   

Dan,
I have checked the Xenial Backports repository too, just in case ...
but didn't help.

I dared to install it in spite of all the security warnings like you did.
It worked and now I have my good old Bitmask running in wattOS too. 

Thanks for your help.   

Dan,
checking that Recommended updates (xenial-updates) solved my problems with installing skype on wattOS, but unfortunately not with Bitmask.

Have to search further for a solution.

Here is the instruction for Bitmask from their website:
Ubuntu 16.04 LTS (Xenial Xerus)
To install

sudo -s
add-apt-repository "deb http://deb.bitmask.net/debian xenial main"
wget -O- https://dl.bitmask.net/apt.key | apt-key add -
apt update
apt install bitmask leap-archive-keyring
Adding the repository works.
Now I will post the terminal return for the "wget" command
root@franz-Inspiron-560:~# wget -O- https://dl.bitmask.net/apt.key | apt-key add -
--2016-10-06 00:12:18--  https://dl.bitmask.net/apt.key
Resolving dl.bitmask.net (dl.bitmask.net)... 37.218.242.148
Connecting to dl.bitmask.net (dl.bitmask.net)|37.218.242.148|:443... connected.
ERROR: cannot verify dl.bitmask.net's certificate, issued by ‘CN=Let's Encrypt Authority X3,O=Let's Encrypt,C=US’:
  Unable to locally verify the issuer's authority.
To connect to dl.bitmask.net insecurely, use `--no-check-certificate'.
gpg: no valid OpenPGP data found.
root@franz-Inspiron-560:~#

Here I am stuck and lost.
Tried to somehow use "--no-check-certificate" and got only error-messages.

VPN does work! This will be a big deal for those using public wi-fi.

Sorry leenie to rain on the parade. 
Opera free VPN does not work .... for me.

It goes off and on, most of the time it looses connection and this means that no website will load until the nasty "free VPN" in Opera manages to catch the connection again.

Unfortunately, Bitmask does not install in WattOS. I use Bitmask in all other distros I am testing ( Sparky, Peppermint 7, LMDE2 and some Linux Mint distros ), there it installs without any problems.

Looks like I'll have to use a non-free VPN as I did before. It worked great and cost me about 5 Dollars per month.

I created the VPN-connection according to the instructions here
http://planetwatt.com/newforum/index.php?topic=742.0

When I click on the vpn-connection, there is action but the lock disappears , then the network manager tries to connect again ...  until it gives up and there is no vpn-connection.

I ran into problems while creating the VPN-connection as described.
The "key.key" file did not open with leafpad, it opened with  Archiver.
In order to paste the key into it, I had to change the settings of the file to get it opened with leafpad.

I tried the instructions on the vpnbook.com website too and managed to get a VPN-connection, but that was somehow a mistake because there was no way described to logout of the VPN.
I had to reboot my PC to find myself on the normal Ethernet connection.

Does somebody has an idea what to do ?

The following thoughts came to my mind.
In Point 7, Dan says:

- Copy all of the text between the <ca> </ca> tags and paste it into ca.crt file that you made.

I therefore copied not the tags + text between,  but only the text.
Maybe I should include the tags ?
My english is not good but from my understanding the tags don't belong into the ca.crt file.
Am I correct ?

Another thought:
Maybe something is wrong with the text files I created ?
Here is a screenshot of the files which are located in the folder created for the VPN.

Why are there questionsmarks on the crt. files and why is the .key  file shown as "Apple Keynote 5 ..." file ?