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I have a HP mini netbook running Windows 7 Ultimate.

I usually leave it running with the lid shut and connected to power. This worked well for two years.

For the past few weeks, I usually find the mini displaying the text "Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key".

Apparently the mini decides to reboot and forget its boot drive.

Switching it off and on eventually results in the mini booting again.

Any idea why this happens? There seems to be nothing special in event viewer.

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How many times (average) is eventually? It sounds as if the drive motor doent kick the platters into spin easily? It is a hard drive right? That could be 2 things, weak power source, or worn hard drive. If you listen to it closely (assuming you can hear over the fan), how goes the spin up? and how goes the first head read? then when it does work how is it different? Be it Flash or Mechanical drive, if you have an Easy way of re-writing all the data without loosing any of it, it would be the first thing I would try, just a solid re-write of everything. –  Psycogeek Dec 18 '11 at 19:35
    
The hard drive works fine. The computer works when I use it. I can switch it on, boot it, use it, play with it and so on. It's only after a while that it suddenly reboots and cannot finds its boot device any more. –  Andrew J. Brehm Dec 18 '11 at 19:56
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I found it powered off two hours later. –  Andrew J. Brehm Dec 21 '11 at 19:34
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"The previous system shutdown at 18:25:50 on 21/12/2011 was unexpected." –  Andrew J. Brehm Dec 21 '11 at 19:36
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I'll check if it is a hardware problem. I'll install Linux and see if it happens again. –  Andrew J. Brehm Dec 22 '11 at 8:55

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