I have an HP Compaq Elite 8300 with a very bare-bones install of 8.1 Enterprise. We have it connected to a 75" Samsung Smart TV and is used to give presentations in a boardroom-type setting. What i am trying to do is set the DPI settings for all users to 150% Whether they have logged in or not.
I found a Technet article saying to change the following registry setting:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Hardware Profiles\Current\Software\Fonts

but to no avail.
Any help would be greatly appreciated