If you can get into Windows use System Restore to roll back to the restore point you created before the installation, if you can't get into Windows press F8 continually at Startup to get to Safe Mode, then use System restore to roll back.
then get your sound driver here
http://support.packardbell.com/uk/my...294420072#show
Hope this helps
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Did that installed the driver ok but still no sound from the speakers i still have on board sound.