503 service unavailable due to “The Module DLL …compdyn.dll failed to load”

Quickly helping  one of colleague where after restoring applicationhost.config from the back up on win2k8 IIS 7 we started receiving 503 Service Unavailable on the browser. As the very first step was to check event viewer where we had the following logged: Log Name:      Application Source:        Microsoft-Windows-IIS-W3SVC-WP Date:          7/28/2009 12:46:10 AM Event ID:      2280 Task…

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IIS7: 503 Service Unavailable due to autostart=false for app pool

While setting up repro for one of the customer on my Vista IIS 7.I ran into couple of issue(i’ll post both) of my own.My application gave up with "Service Unavailable" "HTTP error 503" No matter whatever I browse .htm , aspx everything ends up with that error 503.Looking into event viewer to see something reported…

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