Just do following my step: Visual Studio 2008 1/ Control Panel => Add or Remove Programs (Windows Server 2003 and Windows XP) hay Programs and Features (Windows Vista and Windows Server 2008). => Remove All Below 2. Remove "Microsoft SQL Server Compact Edition 3.5". 3. Remove "Microsoft SQL Server Compact Edition 3.5 Design Tools". 4. Remove "Microsoft SQL Server Compact Edition 3.5 for Devices". 5. Remove "Microsoft Visual Studio Performance Collection Tools". 6. Remove "Windows Mobile 5.0 SDK R2 for Pocket PC". 7. Remove "Windows Mobile 5.0 SDK R2 for Smartphone". 8. Remove "Crystal Reports 2007". 9. Remove "Visual Studio Asset System". 10.Remove "Visual Web Developer Design Service Reminder Tools". 11.Remove "Microsoft Visual Studio 2005 Tools for the 2007 Microsoft Office System Runtime"....
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