Printers: notoriously temperamental but often essential to any standard home office set-up.
Famed for jamming when you need them most, running out of ink at the drop of a cyan, yellow and magenta mixed hat, or often just stubbornly refusing to acknowledge the existence of anything beyond itself like some egocentric mechanical mule, printers have been the bane of many a life since the first development of the dot matrix (younger readers, don’t bother). I, myself, have threatened a whole succession of inanimate inkers with an untimely demise from the first-floor window of my home study on countless occasions, so I know the struggle.