And to gently expand your mind a little:

Be your own security expert - a very important topic - how to stay safe ourselves and help others stay safe too.

Disk wipe utilities - how to put your private data beyond recovery when you dispose of a computer.

Linux migration - how to throw windows out of computers. Whether you're fed up with Windows or want to give an old laptop a new lease of life, Linux is an excellent option, and needn't be in the least frightening.

BIOS is so yesterday! Find out about UEFI and GPT without blowing your mind.