Hi w1nstrel,
Within the last 5 days someone (can't remember which Apple support thread it was on, sorry!) has discovered that the root of this horrendous problem actually lies in the interaction between the AppleMobileDeviceService.exe and a number of anti-virus programs. These include PC Tools Spyware Doctor, Norton, Symantec and a host of other "big names".
I'd had the problem on a desktop machine. The problem is now solved, but what a Sherlock Holmes you have to be to sort it out!
I've used Spyware Doctor with AntiVirus for years (a very good program, BTW) and was running a recent version, 8.0.0.623. I'm also using a laptop at the moment which still has this V8.0.0.623 on it, and it's just done a "Smart Update" and tells me the program is up to date.Eeer, Excuse me!!
If one goes onto the PC Tools website there's a little note somewhere that says something along the lines "For usesr who have had a problem with AppleMobile......... etc, then they should upgrade Spyware Doctor to the latest version. Completely uninstall the version you have and install the latest version from this site"
OK I did that and lo and behold my desktop machine is now running V8.0.0.662.
So how come the version on my laptop tells me "Spyware Doctor is Up to Date"?
It looks to me like there's probably been a major blame-game job been going on behind the scenes between Apple and a number of Anti-Virus software suppliers. Given Apple's litigeous nature at the moment I can't blame these Anti-virus companies from keeping their heads down!
I imagine that all concerned have been working flat out to solve the problem - I just wish they could have agreed on a common public announcement to their loyal customers.
If anyone is interested you can have a look at my website http://www.satellitespy.net for some other interesting insights. Twitter @satispy.