Sorry, I was joking.
I don't really know why SP1 disabled your audio.
Maybe you could try ControlPanel-->System-->DeviceManager, right-click on
audio devices - all of them, wherever you can find "driver" in rightclick
menu.
Then click "uninstall", then click "rescan for hardware changes".
When Audio devices are rediscovered, Windows will attempt to load generic
drivers. If you dont like them, goto you raudoo manufacturer's websites and
download their specific drivers, unless Windows pwn driver is even newer,
which sometimes does happen. SOme manufacturers went bankrupt recently, and
Windows keep supporting those devices even better than origianl OEM
BUT in my case I got th ebest videodriver from my Video manufacturer's
website (NVidia), and NOT from Hp who made my laptop, NOT from Microsoft who
made Windows.
This driver is shockingly beautiful. It;s also huge - 140MB. Back in
1990's the whole Operating System could be 8 times smaller than this driver
alone, heheh.... how times changed.