I upgraded the other day from home basic to home premium using the windows
any time upgrade disk that came with my machine (Dell Inspiron 9000)
Since then I have no sound and if i hover of the sound icon in the task bar
I get the message "No audio output device is installed" Sure enough if I look
in device manager there is no mention of anything to do with sound.

Also I get a message from Mcafee security suite saying that my computer is
not protected, if I open it pretty much all the features are disabled and if
I try to re-enable them or click "Fix now" the Mcafee window flashes a few
times but then hangs or crashes or simply fails to "Fix" the problems.

Any ideas?