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Freeze (Computing)In computing, either a single computer program or the whole system may freeze. This means that either just this process or the whole system is unresponsive to keyboard and mouse input. The window concerned or the whole computer screen becomes static, in the latter case including the mouse cursor. Contrast with crash, where a program exits abnormally with an error message. When no other input works one has to resort to the off button, or sometimes a reset button. The cause of a freeze is usually that the programmer has incorrect termination conditions for a loop. But unstable electricity is an underestimated cause for freezings. More freezings than most people realize is due to interferences in the electricity. Usually, in systems with a modern operating system, the user is able to terminate the program's running (for instance, with the "kill" Unix command, or through the "end task" button on the task list in recent versions of Microsoft Windows), and, if they wish, restart it in the hope that the anomalous condition that caused the freeze does not recur. Older systems, such as those using MS-DOS, often needed to be totally restarted in the event of a freeze. Most newer systems, such as Apple Computer's Mac OS X and Microsoft's Windows XP crash less often; they do not need to be totally restarted in the event of a freeze. Related Link: * Blue Screen of Death
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