Re: How to init or reset USB port via software?

Tech-Archive recommends: Speed Up your PC by fixing your registry

Hmm. This may be irrelevant but I used to have a USB CDMA modem which
is badly designed. It got too hot when being used. While it doesn't
draw too much power, at least one of its internal components is not
quite tolerance to heat. At first, the result was sudden hardware
stall - it got unresponsive. After unplug & replug it physically,
Windows can not detect it consistently. Sometimes it's detected,
sometimes don't. The solution was to cool down the device by putting
it in front of a blowing fan. After it was cooled, it works correctly
again. You might want to try this method too.

Other things I can think of are:
- If your USB device requires a special device driver, you should try
to find an updated version of the driver.
- Try to find out other users experiences who has the same type of
similar USB device (same manufacturer only) by visiting the
manufacturer's website forum, if any. Or use Google to search the web
about trouble with that specific USB device.

IMO, the USB device might use low quality or low durability
component(s). If the device is an old one, it might be the time to
replace it with a new one.


VanguardLH wrote:
Okay, so instead of uninstall/reinstall the USB device itself, I
disabled/enabled its root hub. The result was a popup (lower right
corner) saying a device was found but unknown. I clicked on it and a
list of ports on that hub were listed and the device was "Unknown
Device". So while it seems to detect there is a device attached to
that port, it doesn't know how to identify it.

Next will be to unplug the device, use Nirsoft's USBdeview to remove
all references (enumerations) for the device, manually check the Enum
registry key to ensure all references have been eliminated along with
all mount points that got assigned to them, any other cleanup (registry
and file), and start with a fresh install of the software that loads
off the USB device when plugged in. That's tomorrow's work. Time for
sleep.

Thanks for replying.
.

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