Wow. Can I just say this problem brings back memories of Windows 3.x or 95 with incompatible video cards and trying to get resolution to be something other than insanely large. And that it was the worst experience I've had with the windows OS in the last
ten years. And that it's an hour of my life I'd love to get back.
Don't know how High Contrast got switched on, apparently it can be done with a keystroke set or by answering "yes" to some dumb question on the main sign-on page.
Thank you to NathanMcCloskey for posting your answer, because it was truly helpful, however in an effort to keep things as SIMPLE as possible for the end-user, we had removed the "desktop" icon from the start page. So getting to the point of following your
instructions was a bit more difficult.
In the event that "desktop" is not an icon on the Start page, you need to Right-click anywhere on the start page, then a taskbar will appear at the bottom of the screen. On that taskbar is a button for "All Apps." Click that button in
order to go to what resembles something like a control panel, with icons representing applications. On that page appears an icon for "Desktop." Click that icon, and you're finally to the point where you can right-click the page and choose "Personalize" as
NathanMcCloskey wrote up.