Did you rollback the driver, reboot, run a manual check for updates and hide the unwanted driver update before Automatic Updates got around to installing it again?
Tip: Obtain any driver updates your computer really needs from the device or computer manufacturer's download page only, NEVER via Windows Update (i.e., hide any driver updates offered via Windows Update or configure your system so that driver updates are never offered or installed via Windows Update).
• HOW TO Hide an Update or Restore a Hidden Update (good for Win8/Vista, too)
http://www.sevenforums.com/tutorials/24376-windows-update-hide-restore-hidden-updates.html
• HOW TO Avoid driver updates being installed via Automatic Updates (Method 1; good for Win8, too)
http://support.microsoft.com/kb/2500967
• How to rollback a driver in Win7 [good for Win8, too!]
http://pcsupport.about.com/od/windows7/ht/roll-back-driver-windows-7.htm
or http://windows.microsoft.com/en-US/windows7/Restore-a-driver-to-its-previous-version