Don't you just love it when relatives ask you to "fix his computer" and you end up opening it up to remove dust that's from 100 years back.. Oh, and for free of course since "we're relatives"

I had this friend once that used this as an incentive; he helping me out with my car every now and then, I helping him with his computer. Turned out my car was error free most of the time, while his computer needed maintenance for hours at a biweekly basis. And while I was there, he drank beer and watched sports with his other friends treating me like a service worker. That attitude of his killed that friendship.