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How to save power when you are not working in your computer

You can save power when you are not working by putting your system under stand by. In standby mode the CPU fans, monitors etc will not work, thus saving power. Almost all operating systems have the standby option. 

Let me get into it only for windows xp. Go to start and select shutdown, you should be able to see options like shutdown, restart, standby etc. Just click on standby. When you want your system to be back, just move your mouse and it will be enough to bring back your system to the working condition.
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