The HiJackThis log will do no good... I'm experienced in these matters, and puzzled as to why nothing is showing... I know what to look for, and there's nothing unusual at all. Likewise there are no services running that look abnormal.

Worse still, a third machine (Studio Control Room) has now gone down with it, which suggests it's creeping through the network.

There's only my laptop and the Studio Live Room PC to go - so they're staying switched off for now.

I'm having difficulty accessing the tech forums, as the browser is being hijacked somehow. Mudcat is, oddly enough, behaving almost normally, though I tried to reply to a PM and it didn't happen.