Preventing Windows from Silently Shutting Down Your USB Interface to Save Power
On Windows 2000 and Windows XP,
In the Windows Control Panel, run the System applet
In the System Properties window, click the Device Manager button
In the Device Manager window, expand the Universal Serial Bus Controllers item by clicking the + symbol to its left
Identify the USB Root Hub to which your USB Interface is attached, and double-click it
In the USB Root Hub Properties window, select the Power Management tab, and
uncheck the Allow the computer to turn off this device to save power box
click the OK button
If you have more than one USB Root Hub, it may be difficult to determine to which one your USB Interface is attached. In the Device Manager window, selecting the View menu's Devices by connection option and expanding the resulting tree view can be helpful. Alternatively, you can perform step 5 above on all of your PC's USB Root Hubs.
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