Sony CLIE PEG-UX40 Frequently Asked Questions Manual page 29

Check that the USB port of your computer is enabled
If you are using a Windows 95 pre-installed computer or other older type of
computer equipped with a USB port, the USB port may be disabled by default.
Test the USB port with another device, such as a USB mouse. If that device
does not work, check the BIOS setting of your computer.
In addition, check the setting in the Device Manager: Right-click [My
Computer] and select [Properties] from the menu. (If you are using Windows
2000 Professional/Windows XP, click [Hardware].) Click [Device Manager]
and check that [USB controller] is displayed in the Device Manager window.
If USB controller is not displayed
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For details, refer to the manual of your computer.
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