The computer suddenly sounds like a coffee grinder. Then the screen freezes and goes black. The machine is useless. When the disbelief wears away, you start to panic.
Computers sometimes give no notice before they fail.
When the inevitable happens, you randomly push buttons hoping for a fix. When it becomes obvious that nothing is happening, fear, frustration and anger set in as you realize that important files may be lost. When the computer goes down, the best advice is to stay calm. The machine may be broken, but often the data is safe, although trapped inside. Even deleted files sometimes can be recovered.