Dialog box may be displayed to users when opening projects in Microsoft Visual Studio after installation of Microsoft .NET Framework 4.6

After the installation of the Microsoft .NET Framework 4.6, users may experience the following dialog box displayed in Microsoft Visual Studio when either creating new Web Site or Windows Azure project or when opening existing projects.

Configuring Web http://localhost:64886/ for ASP.NET 4.5 failed. You must manually configure this site for ASP.NET 4.5 in order for the site to run correctly. ASP.NET 4.0 has not been registered on the Web server. You need to manually configure your Web server for ASP.NET 4.0 in order for your site to run correctly.

NOTE: Microsoft .NET Framework 4.6 may also be referred to as Microsoft .NET Framework 4.5.3

This issue may impact the following Microsoft Visual Studio versions: Visual Studio 2013, Visual Studio 2012, Visual Studio 2010 SP1

Workaround:

Select “OK” when the dialog is presented. This dialog box is benign and there will be no impact to the project once the dialog box is cleared. This dialog will continue to be displayed when Web Site Project or Windows Azure Projects are created or opened until the fix has been installed on the machine.

Resolution:

Microsoft has published a fix for all impacted versions of Microsoft Visual Studio.

Visual Studio 2013 –

Download Visual Studio 2013 Update 4
For more information on the Visual Studio 2013 Update 4, please refer to: Visual Studio 2013 Update 4 KB Article

Visual Studio 2012

An update to address this issue for Microsoft Visual Studio 2012 has been published: KB3002339
To install this update directly from the Microsoft Download Center, here

Visual Studio 2010 SP1