USB confusion!

  drew645 02:06 16 Sep 2008

I noticed that several hours after I shut down my computer my USB optical mouse was still illuminated. I had to turn off the power to turn it off.
I have always assumed that USB sockets were only powered when computer is running. Am I mistaken or is there a problem with my computer? I could connect it via PS/2 as I have an adapter.(ditto with keyboard)
Any comments would be appreciated.

  Snec 02:23 16 Sep 2008

It is normal, although a lot of people don't realise there is still power to the machine when switched off until they get an optical mouse. They don't all do it btw, we have one here that doesn't

  drew645 03:06 16 Sep 2008

Aah. Didn't realise that was the case. I am older but wiser!
Thanks Snec.

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