Computer crashes often occur suddenly and with little obvious warning. Once it happened, there is not much you can do, other than wait for the reboot or manually force a reset. The randomness with which a crash can strike is what makes it frustrating; one moment your PC is fine, the next it’s down and your files with it. Most crashes are not as random as they seem, however. There are a number of potential warning signs. Here’s the issues to look for – and how to fix them before they cause any harm.