Both no use I'm afraid (back home now on a sensible OS).
The problem has been ongoing for about 3 months, I've only just got to have a look at it. I think the driver is either missing or corrupted. I couldn't find a driver in microsoft.com for it, and online searches were fruitless.
I did find several programs that would scan for and replace missing / obsolete / damaged drivers (I'm not fussed if they install rubbish along the way since I'll probably have to reinstall the OS soon anyway - I just want to know if it's a hardware or software issue.) These programs turned out to be free to scan, but then demand money with menaces! You know the type - look at what's broken, now pay up or we won't fix them!
Attempts to get this software to function **ahem** totally legitimately without paying **ahem ahem** didn't pan out.
I don't want a patch. Just a USB 2.0 driver for XP.
Anyone have one?