If you get frustrated explaining computer basics, but also cringe at the thought of family members paying for rip-off "PC Optimization", just let Google do it. Or, more accurately, tell Google which really helpful tech support videos to send to your family.
We all get frustrated, believe me — even if you mean well, and the questions are straight-ahead, the disconnect between what you know, and how your intended recipient needs to hear it, is often substantial. Google's Teach Parents Tech web app asks you to pick a few videos from a really good collection explaining the basics. Changing desktop backgrounds, upgrading browsers, cancelling newsletter subscriptions, and some good photo editing and attachment basics that will, in turn, make your own inbox a nicer place to live. When you've got your picks, Google sends along an email with links and thumbnails:
And here's an example video, explaining how to create a strong password (seemed apropos today, no?):
It's a free service to use, and perfectly timed to get some basic tech out of the way so your holidays aren't laced with angry-worded exhortations of "Right-click! No, on the icon! Choose Properties! No, don't right-click Properties!"