by Allen Wyatt
(last updated May 25, 2015)
When I run into people and they learn that I work with computers, one of the questions I'm often asked is whether it is OK for them to leave their computer on all the time. The answer may seem rather evasive: It depends.
This question, while not one related directly to Windows, has long been one of controversy among seasoned computer users. In general, the answer is individual in nature and depends on the amount of time you use the computer. For example, if you use your computer only a couple hours each day, then continuous running is a waste of energy and creates undue wear on the equipment. The more hours you use your computer each day, the easier it is to justify leaving it on around the clock.
Computers are designed to operate continuously, 24 hours a day, 365 days per year. Obviously this puts wear and tear on the computer as heat, movement, dust, and moisture take their toll on the components. Conversely, if you turn your computer off and on more than once each day, you are putting more wear on it than if you had left it on continuously. This is because a computer, just like your automobile, must reach a certain temperature level to operate at peak efficiency. After turning off a computer, components cool and contract. Turning it on again heats the components and makes them expand. All this invisible wear and tear is harder on your system than if you had just left the computer powered on.
This being said, the wear experienced by your computer by turning it on and off is not overwhelming or devastating to your system. The useful life of most office computers is around three years, and the life of most home systems only slightly longer. Even if you turned your computer on and off many times each day, you should still be able to enjoy using your computer well past its average lifespan.
This tip (10859) applies to Windows 7 and 8.
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