There are wasted hours on occasion yes, but the trick is to not fix your relative's (often shitty) computers. I make it a point not to, and my parents are pretty good with their own machines these days anyway.
My poor aunt though, she can never remember her password. She's always asking for help recovering it. So I finally told her, "I don't have the magic solution to that, but I can tell you what I did to figure it out the last time it happened." There's a tool you can use for Windows XP that'll reset passwords, but I don't think it works on newer systems so I'd start at square one. If I'm to start from Google, why can't she?