[ IIS on windows 7 ] IIS Microsoft-HTTPAPI/2.0 Internal Server Error 500


Sometimes HTTP.SYS driver throws error, before the connection reach IIS.

Therefore, there will be no IIS log in this situation.


Server return following the response header

Server : Microsoft-HTTPAPI/2.0

instead of returning the following response header

Server : Microsoft-IIS/7.5


Problem indication

The HTTP.SYS driver log is at C:\windows\system32\LogFiles\HTTPERR

HTTP/1.1 GET /upnphost/udhisapi.dll?content=uuid:whatever-id-it-is 500 - Internal -

Sounds like the UPnP service is using the same port ??


Temporary Solution

services.msc > disable “UPnP device Host” service


ref : https://blogs.msdn.microsoft.com/vijaysk/2010/09/01/fingerprinting-iis/

, http://blog.leansentry.com/the-server-logs-you-need-to-know-to-fix-any-iis-aspnet-error/

, http://computerstepbystep.com/upnp_device_host_service.html



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