HTTP Error 500.0 - Internal Server Error. The FastCGI process exceeded configured request timeout

Installing Drupal 6.1 on Vista SP1 IIS7 and FastCGI

- installed MySQL 5.1.31
- installed PHP 5.2.9 and using FastCGI
- created a Handler mapping for PHP via FastCGI
- created a empty MySQL database called drupal
- ran the drupal install.php page

Page runs as expected. I enter site name and user details

Page then runs fine until the "Configure Site" section and then it runs and runs until a timeout

Error is below. I have increased the FastCGI timeout (both request and activity), checked permissions.

FastCGI Request timeout is now 240secs and activity timeout is 600secs

I still get the same problem running the install, except the page justs runs for longer before timeout.

Funning thing is after the timeout, Drupal is sort of installed. I can log in and do quite a few things, but not everything. e.g. There is no menu option to create a page. If I click on the "create content" hyperlink on the welcome page I get a Drupal "Access Denied" (You are not authorized to access this page) message, even though I'm logged in as the site's administrator

I have spent days on this and have had enough. Hope somebody can help me.

Full install error is as follows

Error Summary
HTTP Error 500.0 - Internal Server Error
C:\Program Files\PHP\php-cgi.exe - The FastCGI process exceeded configured request timeout
Detailed Error InformationModule FastCgiModule
Notification ExecuteRequestHandler
Handler PHP
Error Code 0x80070102
Requested URL http://localhost:80/install.php?locale=en&profile=default
Physical Path C:\inetpub\wwwroot\drupal-6.10\install.php
Logon Method Anonymous
Logon User Anonymous
Most likely causes:
- IIS received the request; however, an internal error occurred during the processing of the request. The root cause of this error depends on which module handles the request and what was happening in the worker process when this error occurred.
- IIS was not able to access the web.config file for the Web site or application. This can occur if the NTFS permissions are set incorrectly.
- IIS was not able to process configuration for the Web site or application.
- The authenticated user does not have permission to use this DLL.
- The request is mapped to a managed handler but the .NET Extensibility Feature is not installed.

Things you can try:
-Ensure that the NTFS permissions for the web.config file are correct and allow access to the Web server's machine account.
-Check the event logs to see if any additional information was logged.
-Verify the permissions for the DLL.
-Install the .NET Extensibility feature if the request is mapped to a managed handler.
-Create a tracing rule to track failed requests for this HTTP status code. For more information about creating a tracing rule for failed requests, click here.

Links and More Information
This error means that there was a problem while processing the request. The request was received by the Web server, but during processing a fatal error occurred, causing the 500 error.

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