Turning the PC off and on again is indeed one of the most regular things we ask people to do and one of the things that fixes a lot of problems (save firing the people who cause the problems), this doesn't always go according to plan. This customer had been on the phone a few minutes previously and was told to restart her PC as it had been sitting "loading startup scripts" for ten minutes
Customer: Hi, I was just on the phone and was told to restart my PC but I'm still having the same problems
Me: Ok, so you've rebooted your PC, it's loaded up again and the same thing has happened?
Me: How long has it been like this since you switched it off? (She'd hung up literally a few minutes previously)
Customer: About ten minutes
Me: Right.. and this is since you turned the PC right off and back on again?
Customer: Well, I turned the monitor off and that went off but when I tried to turn the hard drive off that didn't do anything.
Me: So you've only turned the monitor off?
Had to advise customer that to reboot the PC she had turn the actual PC off and not the monitor. After actually rebooting, it worked!