Download Microsoft Expression Web Service Pack 1 (SP1) from Official Microsoft Download Center

• Microsoft Expression Web Service Pack 1 delivers important customer-requested stability and performance improvements, while incorporating further enhancements to user security. This service pack also includes all of the updates released for Expression Web prior to December of 2007. You can get a more complete description of SP1, including a list of issues that were fixed, in the Microsoft Knowledge Base article 937163: Description of the Microsoft Expression Web Service Pack 1.
  
  Service Pack 1 will install even if a publicly available update has already been installed on your computer.
  
  SP1 also includes stability improvements developed as a result of user input from the Microsoft Online Crash Analysis and from Microsoft Product Support feedback.

Windows Server 2003 Service Pack 1, Windows Vista, Windows XP Service Pack 2

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  This update applies to the following programs:
  • Microsoft® Expression Web
  
  Additional requirements:
  
  • To successfully install SP1, you must have Microsoft Installer 3.1 (MSI 3.1) or higher. For more information, including instructions for downloading MSI 3.1, please see the Microsoft Knowledge Base article 942101.
  • To successfully install SP1, you will need more free hard disk space than the size of the patch itself. For more specific information about the space requirements, please see the Microsoft Knowledge Base article 943589.