bootcamp – How do I solve a sound driver problem with Windows 10 on a MacBook Pro 13 "end of 2011?

I have a MacBook Pro 13 "and Windows 10 installed by the end of 2011 without Boot camp.

Now I have the well-known sound driver problem: No output and no input (speaker and microphone are not working).

I used Boot Camp driver 5.1.5621, which was downloaded with macOS High Sierra (the latest macOS update for my device).

This update from Boot Camp should work, but it will not work.

With Brigadier I have downloaded several Boot Camp versions, but found no working.

If I'm right, I need one RealTek.exe File…

Any idea which boot camp update works for my case?