Turn it off and reboot if that doesn't work, here are some
more detailed resources.
CAVEAT: Screwing around with your computer
may foul it up more than you can believe. These are
suggestions, if they mess up your computer TOO BAD! Please
don't come griping to me if one of pearls of wisdom do not work
for your situation. Call a real geek to fix it, but
these solutions have worked for me in the past
1. Make sure everything is plugged in to power, the power is
on and the machines are connected to each other. (believe
me, do this first)
2. Keyboards and mice get dirty and die. Either learn
how to clean them with compressed air and rubbing alcohol or buy
new ones and change them out.
Error Messages -Type the error (or copy and paste) into
google and see where it leads you. There is a veritable
army of true GEEKS out there who have answered this question
before and you will be able to access their knowledge.
Remember... there is no crying in computer repair!