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Windows Process Activation Service won’t start

The following article just saved my bacon on a server

http://glazenbakje.wordpress.com/2013/07/03/exchange-2013-unable-to-load-exchange-admin-center-ecp/

If the following services wont start after a reboot

Net.Msmq Listener Adapter
Net.Pipe Listener Adapter
Net.Tcp Listener Adapter
Windows Process Activation Service
World Wide Web Publishing Service

And in the Event Log you’re seeing:

The Windows Process Activation Service service terminated with the following error:

The data is invalid.

Then you’ll need to restore the ApplicationHost.config from a good backup in C:\inetpub\history\ to C:\Windows\System32\inetsrv\config then start all the services.

Worked a treat for me

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