Visual Studio design mode don't work at all ... how can I solve?

Visual Studio ( VS2008 ) design mode work good for long time and from about 2 weeks ago it's suddenly stop view any thing i开发者_C百科n design mode i tried a lot with trying in another projects even in a simple web page but no way it's doesn't view any thing in design mode ... I think to reinstall VS 2008 again but I don't know if is there any outher solution for that ?

Two suggestions:

1. Revert all of your settings to default

2. Try a repair before you do a reinstall. It's possible that one of the VS assemblies has been overwritten or deregistered by the install of another application