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Why USB doe not auto-detect devices it should

By donaldjlynch ·
A few weeks age I bought a USB Phillips Web Cam for my Compaq Notebook (Presario X1000) and could not get the thing to work so I uninstalled it.
Ever since then some (most) USB drives I plug in I get the message to load drivers.
I am a tech and have never seen this before on these types of USB devices.
The USB ports work with a Lexar 4gig thumb Flash drive but force the ?Install Drivers? dialog on most other drives including a Sandisk Cruzer Micro 4gig Flash drive.
I know it?s not a brand related problem because my external card reader stopped working
(It was Lexar) and the only one I can get to work now is a Sandisk Image Mate 12 in 1 (and that was only after I loaded the supporting software).
The ports on the notebook are USB 2.0 (I know this for a fact).
The BIOS is up-to-date.
All available Windows XP Pro updates are installed (including any from the custom update selection).
I have removed the device description for the unrecognized drives and tried again
(A number of times).
I have removed all USB ports (from the device manager) and let them reinstall.
I have use a number of tools to clean the registry (like ?RegCure?, ?RegScrubXP?, and ?RegCleaner?).
I have gone to the web sites of the drives not auto recognized and they all say the same thing ?No driver is needed for Windows XP?
All this and I get the same result when I plug in these unrecognized drives.
Any help out there would be greatly appreciated, and it?s ok if the answer is hacking the registry (been there and know that)

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