Sony VGN-TZ340NCP - Manual (Page 220)

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Troubleshooting
Docking Station
What should I do if an error message appears when I press the UNDOCK button or select
Undock Computer from the Start menu?
❑ When any device inserted or connected to the docking station is in use, you cannot disconnect your computer from the
docking station. Save unsaved data, exit applications using such devices, and then try again.
If the above does not work, shut down your computer and disconnect it from the docking station.
❑ Be sure to return to the original log-on user before disconnecting your computer from the docking station. An attempt to
disconnect it as any other user may cause malfunctions.
For switching users, see Windows Help and Support.