
When there is a page fault.
Computer errors are the most annoying things on this planet. But there are several ways to deal with this issue. The first is try and troubleshoot within your own computer. If you own windows there is a whole "HELP" section in the computer to help you out.
Secondly you can call a tech specialist and they can go through the error with you. You should make sure to write down or memorize the error message at hand, so as the tech rep can assist you easily.
Just try not to get frustrated. Call a family computer friend to help you out.