I've got a digital camera (Samsung D85 aka S85) and it's suddenly stopped being able to communicate with my PC. What I mean is, I've got a cable that plugs into the camera and into a USB port on my PC. When I plug it in and switch on the camera it shows up as an extra external drive, and a message pops up on the camera asking if I want to download to the PC, and when I say yes, it does its tricks, downloading both both still pictures and video clips.

At least that's how it's always worked - but now instead there's no message, the camera just switches on ready to take pictures or show them on its screen, and the PC doesn't recognise its existence.

Subsequent to this problem arising (and because of something quite different), I've reinstalled Windows. And for good measure I have also reloaded the drivers and software from the camera's accompanying CD. But no joy.

One obvious way round this that proved a dead end - my PC has a slot on it for SD cards, so I tried using this for the 4 GB card from my camera - but when I try to open it, the hourglass icon shows and then hangs on, but I can't access the contents of the card.

Anybody got any suggestions or pointers ? (In every other respect the camera is working fine.)