My microphone is vislible and shown as default in sound settings but the windows sound recorder does not work "An audio recording device was not found" and Skype echo voice test does not work.

That can be annoying. It's usually a driver issue then a failed card or device. Here's what I use to inventory the PC to save a lot of time. Read
https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web

Do try the PC maker's drivers first then if you can't sort it, consider some USB SOUND CARD. Examples at Amazon are under 10USD.
https://www.amazon.com/Best-Sellers-Electronics-External-Sound-Cards/zgbs/electronics/3015427011

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