>Most tablets has the auto rotate as an option which you can turn off in the setup.

Thanks, this is what I had to start with.

I have found this page:

http://it.nmu.edu/docs/windows-8-auto-rotate-feature

In the first section, when I go in the charm bar, in Screen, the lock icon is disabled. So, I cannot do anything in there.

When I try to do it from the Screen Resolution section, it says "Auto rotation is not supported for multiple displays".

So, I unplugged the HDMI cable.

I was able to turn off that switch.

It works perfectly.

Thanks