I'm not real sure about this - but this has helped with my SanDisk thumb drives (both steps were required to completely fix it) I have not done this on any U3 enabled devices (I strip that off the thumb drive the first time that I insert it).
1) Remove all USB devices from the system. Then, open up Device Manager (Start...Run...type "devmgmt.msc" (without the quotes) and press Enter. In the menus at the top, select View, and then check "Show hidden devices".
Then, expand each tree and right click to uninstall the instances of stuff that's not connected (shown in a lighter shade of gray). Be careful not to uninstall things like meeces (plural of mouse
and other non-storage devices. Of particular concern to me was all of the disk volumes that the USB drives had mounted.
Then, download new drivers for each of the devices from the manufacturer's website and install them according to the directions.
2) If this still doesn't solve the problem - copy the contents to your desktop or another drive - and then format the drive at the default values. Then move the stuff back to the drive and all should be well.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able. - John
(my website: http://www.carrona.org/
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