trouble (oneself) (to do something)
To burden or inconvenience oneself with the undertaking of some task. Often used in negative constructions. Don't trouble yourself, Jeremy, I can cut the lawn myself another time. He couldn't trouble himself to make a backup of the computer, and now he's lost all of his work.
trouble oneself (to do something)
to bother oneself to do something. He didn't even trouble himself to turn off the light when he left. No, thank you. I don't need any help. Please don't trouble yourself.