Just wanted to quickly get this down before I forget, as I've not seen it anywhere else on the Internet.
I have a Gateway laptop running Windows 8, with an extremely annoying key that I've been trying to get rid of for months. The "Social Media" key, located right above the numeric keypad where I would constantly hit it by accident, always opened the "Social Media" app, which I very rarely want to open but don't want to completely get rid of.
All keyboard mapping programs that I've found on the Internet, say that the key is unknown.
After much searching, I sort-of came across a workaround by accident:
It turns out what the key actually does, is pretend I'm opening a file with a .sns extension. So what I wound up doing, was going to Control Panel | Default Programs | "Associate a File Type or Protocol with a Program", then finding and selecting the .sns extension, and hitting, "Change Program" and "More Options," then cancelling out. This seemed to clear the extension.
It doesn't fix the problem altogether. But at least now, when I hit that button by accident, it opens a dialog asking how I want to handle the file, which is much more convenient to cancel out of, then the entire social media app.