Tony, the reason that I asked here rather than the Rio HD Portables section is that I'd tried all the things I could think of (paperclip reset, new dock, new usb cable, different usb port, plug/unplug, restart PC, restart player etc), and kind of guessed I'd be looking for a new player, not a fix.

I have recently changed from Win2K to Vista but have had no previous issues with RMM.

The only thing I didn't try that you've listed was to plug the player in direct to USB/power cables, have just done that, and guess what? It worked. Whenever I dispose of it I'll definitely let the guys here know, I've got 3 lots of accessories and 2 (both now functional) players in nice leather cases.

Many thanks, as usual