Microsoft audio driver windows 10 download

Hello,

I have a Inspiron 14R which is updated to windows Ever since Windows , I have a problem with EXTREMELLY LOUD NOISE on my internal microphone and I was using "High Definition Audio Device" driver by Microsoft.
Three days ago I decided to install a driver from the dell support's list. In my case, is exactly this: www.cronistalascolonias.com.ar;fileId=&osCode=WB64A&productCode=inspironr&languageCode=BP,EN&categoryId=AU

"Wow, amazing, my microphone is working properly now, yay", I've even called some people on skype and it was fine. But yesterday the notebook stopped recognizing my headphone (I doesn't even appear in the "Device Manager" list) and the audio didn't work.

Well, I found a lot of other people with the same problem and the solution was to change the driver to "High Definition Audio Device". I did it and the sound returned, but my mic is still noisy.

Why did the audio stopped suddenly? I've tried to restore the system, but it didn't solved the problem.

Now I'm back with the microsoft driver and no microphone. The ideal was to have a driver that works properly, but it's not the case. How can I manage to reduce the noise in my microphone without the conexant driver? Or will this problem with incompatibility between W10 and conexant be solved?