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My laptop runs windows 8 and has 2 USB 3.0. port. One day, when I shut down my laptop, I forgot to take off my USB modem. But the USB modem light is still blinking. I tried to move it to the other port, and the light is not blinking. I assume that the second port has no power. But why did the first one have power?

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  • To prevent that usb port still have power after shutdown go to BIOS and set EuP / ErP on.
    – Leo Chapiro
    Apr 18, 2015 at 11:12

1 Answer 1

Reset to default
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This is so devices still operate after PC shutdown, this is considered a feature on some laptops, for example this can be used for charging a cell phone or other device after the laptop is shut down. Most laptops have a setting in the bios to disable "always on usb". USB Ports that have this feature are yellow.

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  • But my USB port color is blue like the other USB 3.0 port
    – Hanny Udayana
    Apr 19, 2015 at 5:38
  • Then there is something wrong with that port, it should not do that.
    – Moab
    Apr 20, 2015 at 0:24

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