Access to Tomcat server has not been authorized

Question

I have used glassfish server in netbeans, now I changed to tomcat and when I run my web application that I have created in glassfish gives me the error :

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Answer 1

I really should make this a comment if have enough reputation:

PLEASE the first comment by @Satya advicing to remove should be ignored (at least on windows - which am sure of). check this if don't believe me

After many hours on SO I resolved the issue by:

1. Making sure IDE and text editors (notepad++) are launched with Admin rights
2. Edit the %TOMCAT INSTALL DIR%\conf\tomcat-users.xml as directed in earlier answers especially this one on a duplicated question and this too

3. Check that xml file again, I mean properly for syntax errors. Use a good editor for xml, notepad++ help me figured out my error. Thanks to this SO answer

4. Save the file and start Tomcat