Hi.
I have had this problem for 12 months when a card reader did the same thing.
Could not get it sorted. Recently bought Tomtom sat nav guess what same
problem. Tried everthing suggested and a few more besides. Then I removed the
logitec webcam pro5000 usb lead plugged in the tomtom and hey presto it works
fine. Downloads etc with no problem. As the tomtom is more important to me I
am resisting plugging in the webcam. Could there have been some kind of
device conflict, although nothing showed up. I am a novice really at all this
and only sorted it by trail and error.

Best of luck
Speedy


"murph399" wrote:

> switched on today and webcam and memory sticks not working. Info bubble says
> "usb device malfunctioned, and windows does not recognise it" Device manager
> says "unknown device". Have have tried uninstalling and then reinstalling
> but same thing happens. HELP!! been at it for about 2 hours now. printer and
> bluetooth dongle seem to work ok, but nothing else.