3Com 3CRUSBN275 Quick Installation Manual page 17

Problem
Installation
program does
not finish or
the driver fails
to load
Windows
shows the
USB Adapter
as an unknown
device
Power/Activity
LED is off
Use the Device Manager to resolve resource conflicts
that may exist. To start the Device Manager, go to the
Control Panel, double-click System, and then click
the Device Manager tab.
Find Network adapters by selecting Device
Manager. If a yellow exclamation mark is displayed,
you need to reinstall the USB Adapter. Right click the
USB Adapter to be updated, click Update Driver... to
update the USB Adapter driver following the prompt.
Find Network adapters by selecting Device
Manager. If no USB Adapter is displayed under
Network adapters, click the Scan for hardware
changes icon to search for any available adapters. If
a yellow exclamation mark is displayed under
Network adapters, you need to reinstall the USB
Adapter.
Verify that the USB Adapter is properly connected to
the USB connector.
If Windows still does not recognize it, use the Device
Manager to remove the unknown device, and then
reinstall it.
Verify that the USB Adapter is properly connected to
the USB connector.
Verify that the driver was installed successfully by
checking the status of the device on the Device
Manager.
Possible solution
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