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I have a Dell Dimension 5150 running Windows XP, it has a Intel Pentium dual core 2.8ghz processor and 2gb of ram. It also has 5 users, of which only one is an admin. The others are limited.

Could anyone suggest a reason it might be turning itself on automatically as when ever I get home it is on, having always turned it off the night before, and a way to remedy this.

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Are you shutting down or putting it to sleep/hibernate? – SgtOJ Nov 30 '10 at 20:24
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3 Answers

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Dells come with a BIOS option to turn themselves on at a certain time. Look into that.

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Thanks =) that did the trick, looks like someone hda decided to fiddle with the BIOS – Sammy Dec 16 '10 at 23:03
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up vote 3 down vote

I've seen a couple Dell machines that did this, too - check and see whether "Wake on LAN" is enabled in the BIOS. If it is, there might be some network activity that is causing it to turn on by itself.

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Good tip, I didn't even think of this. – Randolph West Nov 30 '10 at 20:29
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another thing to check is to see if there are any Tasks scheduled that are set up to wake the computer when they run

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