Can'；t在Windows 7上运行IIS Express 8

当我尝试使用以下命令运行IIS Express 8时

iisexpress.exe/trace:error

在Windows 7上，我收到以下错误行：

"C:\Program Files (x86)\IIS Express>iisexpress.exe/trace:error
Starting IIS Express ...
Failed while trying to preload CLR version v4.0.  hr = 80131700
Failed to initialize the W3WP_HOST  hr = 80131700
Process Model Shutdown called
Unable to start iisexpress."

如何在我的Windows上运行IIS？

答案就在这里：（在相同的情况下它对我有帮助）