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Error 1747 : The Authentication Service is Unknown in Windows 7

Last Updated: 4/29/12

This article is the most thorough for dealing with this error:
http://www.corenetworkz.com/2009/04/error-1747-authentication-service-is.html

Have a backup and be ready to reinstall windows if this solution doesn't work!

I think this issue was caused by bonjour for windows which is included with iTunes.




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