This product requires ASP.NET v2.0 to be set to ‘Allow’ in the list of Internet Information Services (IIS) Web Server Extensions.

When trying to install Microsoft Windows SharePoint Services 3.0 you receive the following error:

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Setup Errors
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Setup is unable to proceed due to the following error(s):
This product requires ASP.NET v2.0 to be set to ‘Allow’ in the list of Internet Information Services (IIS) Web Server Extensions. If it is not available in the list, re-install ASP.NET v2.0.
Correct the issue(s) listed above and re-run setup.

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OK
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In my case the .Net Framework was installed but it wasn’t in the Web Services Extensions list. I’m assuming this is because I installed IIS after the .NET framework.

To fix this error you will need to open up a command prompt window and change your directory to “C:\Windows\Microsoft.NET\Framework\v2.0.50727″ and run the command “aspnet_regiis.exe -i” as shown below.

After this command completes successfully you will need to open up IIS Manager and go to Web Service Extensions and mark “ASP .NET v2.0.50727″ as Allowed if it isnt already.