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My computer is an Acer notebook connected to a HDTV.

When I get up and walk away from the computer almost every time I hear the disconnect USB device sound after a few seconds.

How is this possible? There is no wires or vibration issues, and I haven't noticed any device stop working as far as external keyboard and trackball etc.

I have seen on the Internet I'm not the only one this happens to.

What's going on?

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Exactly which model of Acer is it? – Ƭᴇcʜιᴇ007 Mar 9 '13 at 19:05
Do not you have any Bluetooth device with you (telephone, headset, pocket computer, GPS, barcode scanner...)? It usually has a short range of operation so it could easily disconnect when you walk away from the computer. --- Open the device manager in Windows and watch if a device does not disappear when you walk away. – pabouk Dec 13 '13 at 10:31

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