As we're all going about our various Easter, Passover, et al., family celebrations, I have the perfect solution to help train your families to stop asking you for help with mundane computer stuff:
Every time someone asks you to do/fix something, give them a full talk about what is going on in their computer around that system.
Don't forget you can talk about lots of things too:
- concurrency
- TCP IP / socket networking
- multi-threaded programs vs. single threads
- RISC vs. CISC processors
- Why linux is better than Windows or Mac
- algorithms
- logarithmic runtime
- teach them how to convert between hex, binary, and base ten
Really pour it on too. Soon they'll either figure out that you are a highly-skilled individual who is not their personal geek squad, or they'll be too afraid of a big lecture to ask for help.
Works with my in-laws like a charm.

Apparently they knew how to program in bible (partial translation of a traditional passover song below):

If He had brought us out from Egypt,
and had not carried out judgments against them
— Dayenu, it would have sufficed!
If He had carried out judgments against them,
and not against their idols
— Dayenu, it would have sufficed!
If He had destroyed their idols,
and had not smitten their first-born
— Dayenu, it would have sufficed!
If He had smitten their first-born,
and had not given us their wealth
— Dayenu, it would have sufficed!
If He had given us their wealth,
and had not split the sea for us
— Dayenu, it would have sufficed!
If He had split the sea for us,
and had not taken us through it on dry land
— Dayenu, it would have sufficed!

חג פסח שמח