New Realtek driver not fully working

Hallo, I installed the new Realtek High Definition Audio driver 6.0.1.6363. The sound produced is good but the recording feature with the Windows Soundrecorder for example and internal/built-in laptop microphone doesn't work any more (message: the apparatus for sound recording cannot be found) and it did work before very well with previous driver Microsoft High Definition Audio 6.0.6002.18005. In Sound/Recording there is now also a new function Stereo-Mix also and Line-in for external microphone, this detects the external microphone and the soundrecorder works apparently (but no recorded signal indication), but when the record is played back with WMP, there is no sound reproduced at all. Should I do a rollback to the previous driver? And that Stereo-mix is disabled anyway in Vista I read somewhere for copyright reasons or something else, thus useless. Why does Realtek offers now drivers for possibly disabled Stereo-mix by the way? With the previous driver Stereo-mix wasn't even visible in Sound/Recording

Welcome, new is not always the best, on an idividual basis. Either roll back from the device manager or use System Restore.
http://www.vistax64.com/tutorials/76905-system-restore-how.html
I had the same problem with a graphics driver. I installed the new and then I could not set the resolution that I wanted. I rolled back and now everything is just fine.

Thank you, I did the rollback and it's ok now.

Glad that you took my advice. I have found that a problem like yours is rather common. As I said I had the same problem with graphics. I always make a system restore point, before updating, just in case I have problems.

That is what can sometimes happen with driver updates. Many updates concentrate on incorporating bug fixes, code optimization, and increased performance. Unfortunately, what can sometimes also happen is that certain features no longer work as well as they used to in a previous driver incarnation (this can be dependant, to a certain extent, on hardware configuration). This can result in the update being withdrawn if the problem is reported as being widespread (as is the case with one of the NVidia graphics drivers about a year or so ago).

Hopefully, the next driver release will address the issue you've been having.