Just spent the last few days trying to figure out why my Dell Latitude E6430 wasn't responding on the Super-Speed USB ports in Windows XP. It came in with BIOS rev A02 and defied valiant attemtps to get a response in Windows from these ports. USB mice, Keyboards and Flash drives all failed to get a response from the port.
After a support call with Dell, I upgraded to A03 (although no release notes on the A03 update to say what this update resolves). Still no joy. Left it alone for three days and this morning plugged in a USB Flash drive.And magically it all worked. Hmm.... perhaps I didn't reboot enough after upgrading to A03??
So I got hold of the A02 BIOS and downgraded. USB ports still fine. WHAT?!?!? Nothing I can do now can return the machine to it's previous state of buggered USB 3.
Go figure huh? Time to blame it all on comic rays and move on. The alternative is of course to accept that I'm going mad. Naturally, that I'll never do!
hardware evaluator's note from the trenches: the pesky accelerometer drivers will kill XP sysprep every time. You can't do the trick of downgrading the drivers anymore to resolve the sysprep hang as the older accelerometer drivers just don't work for the modern chips. This now must be installed as a post-installation job which is pretty icchy.