After putting a computer screen on a set, I realized I'd been looking at and using the default image for a long time.
To get a new one, all you have to do is press The Print Screen button (usually around the F12 key) and an image will be created of whatever is on your (real-life) computer screen.
Then open Paint and press Ctrl + V to paste
Save as a bitmap or jpeg and load it into your movie.
Presto, a custom made screen!
I've used the screen capture function a LOT when using MS. For example, if I need a color for a texture, I will simply take a screenshot of the color using a basic writing program quickly, or even grab a texture from something online. It's also a great way to simply add in images like for a picture frame or even for a mask. In fact, my desktop is usually littered with screenshots that i have used for a ton of projects. Alsoa great way to share what you are working on right now with social media! Great tip!