.NET not picking up browser files so IE11 is not detected

Question

I have created an ie11.browser file and added it to my Windows server hoping .NET will start detecting IE11 instead of assuming a default browser without Javascript capability. Read more about this issue here: doPostback failing in IE 11+ Windows 8.1

• I installed Microsoft hotfix 2836939
• I Added Sistemas-infoe's ie11.browser file to the App_Browsers folder
• I restarted IIS
• I restarted the entire server
• I added the ie11.browser file to C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\Browsers and to C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config\Browsers
• I ran aspnet_regbrowsers -i for both locations
• I reset IIS
• I restarted the server
• I ran aspnet_regbrowser -u for both locations (and -i again afterwards)
• I disabled "hide extensions for know file types" hoping my browser file would have a hidden txt extension.

But somehow IE11 just doesn't get detected and it seems the browser files aren't read.

Is there any logging available that gives more info about this situation? I am completely in the dark as to why .NET still won't detect IE11.

Answer 1

Somehow asking stuff on Stackoverflow always gets me a solution. In half of the cases someone answers my question in the other half I come up with an answer myself five minutes after I posted the question.

I re-installed the update and rebooted again and somehow the browser is now detected. I have still no clue why this took more than two reboots.