SPVisualDev Windows Service will not start

Jun 23, 2010 at 3:37 PM

I recently noticed that the SPVisualDev windows service is not started and manually triggering a start yields a message "The SPVisualDev Windows Service service on local computer started and then stopped. Some services stop automatically  ...". This is a standard message so nothing could be derived from it. I eventually tried re-installing the SPVisualDev application and the installation just stalled due to the windows service not starting.

Looking into it further I discovered that the SPVisualDev Windows Service threw an exception during start. The exception that was being thrown is "Could not load type 'System.Security.Authentication.ExtendedProtection.ExtendedProtectionPolicy' from assembly System”. I later discovered that there was recently a couple of Microsoft patches that were installed on the system that were the root cause of the problem (KB980773, KB976769v2). You can read more about it here. The fix was to remove the stated Microsoft patches and all is well now.

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