Why is it that your IT guy is always asking you to turn your computer off and on again? Well because many times this actually takes care of the problem. If the problem is from an anomaly from a software glitch that is only created after a certain sequence of events, this usually works. When a computer has locked up or is not responding it may be because of code which is running in the memory (RAM) of the computer. Everything in RAM is cleared out when it is no longer receiving power, giving you a fresh slate when it is rebooted.
This will not of course fix hardware issues or more permanent problems with the operating system contained on the hard drive. But it’s definitely worth a shot, so the next time your IT guy asks you to turn it off and on again, you’ll know he’s not just giving you a hard time!