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Ports
General USB troubleshooting
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USB FAQ
What is USB 2.0?
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How to turn off the
Hi-speed USB device plugged into non-hi-speed USB hub" warning message
USB Power Exceeded Error Message
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Maximum size of USB transfers on various operating systems
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USB devices may not work after you start your Windows
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The basics about universal serial bus
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USB port may stop working after removing or inserting USB
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Troubleshooting Port Problems
Infrared, IEEE-1394, USB, Parallel & Serial ports
Failures of the serial, parallel, and game ports tend to end with poor or no operation of the peripheral. Generally, there are only four possible causes for a problem with a device connected to an I/O port:
