The most common error in supporting customers with computer errors is the picnic error.
Often people are so overwhelmed with computers software and hardware that they cannot think logically and try to fix the error themselves. That is because they made the picnic error.
Wikipedia describes the picnic error as :(humorous) Acronym of problem in chair, not in computer (or person in chair, not in computer); states that the problem was not in the computer but was instead caused by the user operating it.
When you run into this error you can, breathe deeply, think logically and try to fix this error. Start by restarting your computer, and deducting whether the computer hardware is malfunctioning or is the software on the blink.