TMG 2010 Remote Access Server won't Start

I've got an issue on my production TMG box.
It's a Windows 2008 R2 box with TMG 2010, Forefront Protection 2010 for Exchange and Exchange 2010 Edge Server.
It's fully patched with additional rollup updates installed.

Remote Acces Server stopped starting.
I see the actual problem is Network Policy Server won't start.

When I attempt to start Network Policy Server from the Services MMC console I get:
'Windows could not start the Network Policy Server service on Local Computer.
Error 0x80070032: The request is not supported.'

The event viewer contains this:
The Network Policy Server service terminated with the following error:
%%-2147024846

I've searched the web and found a few tidbits on the subject but none helped.
This has happened to me before early in the build and the only resolution (even with MS help) was to rebuild the box.

I need someone to help with troubleshooting or point me in the correct direction.



rvermulmPresidentAsked:
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Keith AlabasterEnterprise ArchitectCommented:
I'll be blunt - I cannot see what you expect to achieve here. Whilst we endeavour to help wherever we can, if you have already (previously) logged this issue as an incident and the result is 'rebuild it'. MS usually take the approach that if you have paid for an incident then you are quite entitled to re-open it if the issue persists.  

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rvermulmPresidentAuthor Commented:
I'll be blunt also,
I had an unskilled MS support person who destroyed the install so the only option was to rebuild.
I was hoping for someone who may have had the similar/same problem and solved it w/o rebuiding.
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simonlimonCommented:
The link also provides some troubleshooting tips...
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rvermulmPresidentAuthor Commented:
simonlimon,
Thanks for the link.
I went back thru all the trails these links have and none helped.

I have one item I'm trying today from the links of uninstalling Windows Backup feature, reboot and see if Network Policy Server comes up.
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Keith AlabasterEnterprise ArchitectCommented:
I'll pick this up if a fix is not found
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rvermulmPresidentAuthor Commented:
Gents,
I jsut removed Windows Backup and restarted the box.
No joy, Network Policy Server will not start, same symptoms.
Any help would be appreciated.
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rvermulmPresidentAuthor Commented:
Gents,
I've got a resolution.

I deleted all the files in the c:\windows\system32\ias directory and replaced them with the files from a working backup TMG, rebooted the server and after a 10-15 minute reboot, everything is working again.
Evidently a file got corrupted?
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rvermulmPresidentAuthor Commented:
It fixed the problem
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