(Service Unavailable) Could not load all ISAPI filters for site/service. Therefore startup aborted.

Hi,

After running the Sharepoint products and technologies configuration wizard successfully, the central administration site page opens up.

( We were installing MOSS 2007 on 64 bit machine)

But in my case it was giving the following error

“Service Unavailable”

Checking into event log gave the following information

<!--[if gte mso 9]> Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 <![endif]--><!--[if gte mso 9]> <![endif]--> <!--[endif]-->Could not load all ISAPI filters for site/service. Therefore startup aborted.

and

<!--[if gte mso 9]> Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 <![endif]--><!--[if gte mso 9]> <![endif]--> <!--[endif]-->

ISAPI Filter ‘C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_filter.dll’ could not be loaded due to a configuration problem. The current configuration only supports loading images built for a AMD64 processor architecture. The data field contains the error number. To learn more about this issue, including how to troubleshooting this kind of processor architecture mismatch error, see http://go.microsoft.com/fwlink/?LinkId=29349.

Searching for it the solution that I found was the following

// Disabling the 32bit mode for your web site.

cscript C:\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 0

and then the following

// Registering ASP.NET 2.0 as the default framework for that web site

C:\Windows\Microsoft.NET\Framework64\v2.0.50727>
aspnet_regiis.exe -i

This resolved the issue for me!!