I have found that our ASP.NET application runs differently on different machines in IIS Express. All have VS 2012, .Net 4.5 and Integrated mode. But some has VS 2012 Update 1, some not.
How do I find IIS Express version?
Browse to "C:\Program Files\IIS Express"
, select the file iisexpress.exe
, press Alt+Enter to open the properties dialog, click on the Details tab and read the product version.