An update for you - despite still having the same reg setting, my XP machine reverted to the march of death on shutdown and nothing could I do UNTIL I discovered (call me slow) UPHClean-Setup.msi by M$ which handles processes that do not shut-down cleanly. I guess some driver update had snafu'd my machine. I believe it is only valid up to XP, although there are hints of Vista and thus presumably 7? Back to a lovely shut down and now no time to take the dogs out into the garden while I wait.
