USB Port Remains Active for Disabled or Safely Removed USB Device
If you have a USB device connected to a computer running Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2, and you then Disable the device in Device Manager, or Safely Remove the device using the system tray icon, you may observe one of the following symptoms:
- The USB device shows continued indications of activity (such as an LED that remains illuminated).
- The USB device continues to receive USB packets and continues to consume power corresponding to an active device state.
- Physically disconnecting the Disabled or Safely Removed USB device may, in some cases, cause an error in an active transfer to a different USB device.
These symptoms are not observed on a computer running Windows XP or Windows Server 2003 under similar conditions.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB2401954.