Update messed up sound card & windows takes forever to load!

Today my computer downloaded & installed the following auto update files
when I shut down the computer.
Later when I turned on the computer, it took over 15minutes to load & get to
my desktop and also my sound card is completely non-functional since these
updates were installed (All I here is a monotone beep instead of the usual
error dings, and when I try to play music e.g. windows media player, the
following message "Windows Media Player cannot play the file because there is
a problem with your sound device. There might not be a sound device installed
on your computer, it might be in use by another program, or it might not be
functioning properly."

Any help you could provide regarding this would be greatly appreciated.
thanks!

Sunday, April 16, 2006 Automatic Updates
Windows XP Security Update for Windows XP (KB908531)
Windows XP Security Update for Windows XP (KB911562)
Windows XP Windows Malicious Software Removal Tool - April 2006 (KB890830)
Windows XP Cumulative Security Update for Internet Explorer for Windows XP
(KB912812)
Windows XP Security Update for Windows Media Player 10 for Windows XP
(KB911565)
Windows XP Cumulative Security Update for Outlook Express for Windows XP
(KB911567)
Windows XP Windows Malicious Software Removal Tool - March 2006 (KB890830)

Editing the registry didn't help me,
but I "Removed/Unistalled" the KB908531 update (see instruction 3. at
http://aumha.net/viewtopic.php?t=19125 ) and that did the trick.

When I restarted my computer, I was so happy this time to hear the windows
startup wav!