Troubleshooting "Visual Studio 2008 Design view hangs" issues
Over the last few months we've collected information on various issues related to design view not working in Visual Studio 2008 or Visual Web Developer Express 2008. Here is list of known issues and possible solutions: Microsoft Visual Studio Web Authoring Component fails to install. 1. Pre-release Office 2007 components are installed. Most often it was XPS Add-in for Office 2007. 2. Expired trial version of Office 2007 is installed. 3. Some Office components are installed, but are not visible in Control Panel. Solution: uninstall offending component. You can verify if Office is RTM by checking version of MSO.DLL in C:\Program Files (x86)\Common Files\microsoft shared\OFFICE12 . Right click on MSO.DLL and choose Properties -> Details
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Read the complete post at http://blogs.msdn.com/webdevtools/archive/2008/10/03/troubleshooting-visual-studion-2008-design-view-hangs-issues.aspx