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We have existing server with following configuration:

Hardware : Intel(R) Xeon(R) CPU E5430 @ 2.66 GHz 2.67 GHz, 8.00 GB of RAM

Installed Software: MS Windows Server 2003 Standard x64 Edition Service Pack 2

IIS : IIS V6.0

MS .net Framework : 3.5

Can we upgrate this configuration for .net 4.0?

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Yes. Have you even tried it? See – Sven Oct 30 '13 at 10:46

Since you are on SP2, then yes.

This has been asked before:

It points to an article here:

Also the Microsoft page for the .net 4 framework installer shows the requirements to be:

Supported Operating System

Windows 7, Windows 7 Service Pack 1, Windows Server 2003 Service Pack 2, Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 R2 SP1, Windows Vista Service Pack 1, Windows XP Service Pack 3 •Windows XP SP3 •Windows Server 2003 SP2 •Windows Vista SP1 or later •Windows Server 2008 (not supported on Server Core Role) •Windows 7 •Windows Server 2008 R2 (not supported on Server Core Role) •Windows 7 SP1 •Windows Server 2008 R2 SP1 •

Supported Architectures:

•x86 •x64 •ia64 (some features are not supported on ia64 for example, WPF)

Hardware Requirements:

•Recommended Minimum: Pentium 1 GHz or higher with 512 MB RAM or more •Minimum disk space: •x86 – 850 MB •x64 – 2 GB •


•Windows Installer 3.1 or later •Internet Explorer 5.01 or later

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If you download .NET 4.0, you will be able to deploy applications with this framework.

However, there are additional steps to get it working. Once you install .NET 4.0, run the following from your C:\windows\system32 folder:

cscript iisext.vbs /EnFile C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll

Note that the actual version number may vary based on the current version number of .NET. Then, run cscript iisext.vbs /ListFile and you should see a "1" next to the .dll file for 4.0.

Good luck!


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