ok.. just finished installing SP1...
And now? trying to establish WTF happened to my ****ing audio!!!
I had every reason to have some niggling doubts............ everything else is ok, however....
nm.. sorted it.. had to kill it in device manager and then have it relook for it and install it - problem solved....
Not bad though, took about an hour for it to install, it rebooted four times and I only wanted to knock the stuffing out of it once...