Microsoft SQL Server 2005 Express Edition Service Pack 4 (KB2463332)

Installing below update keeps failing:
Keep getting error message 42A2. When clicking on get help with this error I'm redirected to a list of codes that doesn't contain 42A2.
Please help.
 
Microsoft SQL Server 2005 Express Edition Service Pack 4 (KB2463332) Download size: 55,8 MB You may need to restart your computer for this update to take effect. Update type: Important This service pack upgrades all Microsoft SQL Server 2005 Express Edition instances and components to Service Pack 4 (SP4). If you need additional installation options, you should download this service pack at the Microsoft Download Center. For more information, see Microsoft Knowledge Base article 2463332. More information: http://support.microsoft.com/kb/2463332
 
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