Hello JuN10ru,
Please try the latest version of Bandicam.
https://www.bandicam.com/downloads/
Regarding the microphone related issue, please refer to the following link.
* How to record your voice in Windows Vista/7/8/10
https://www.bandicam.com/faqs/how_to_re ... icrophone/
If it doesn't work, please let us know the model of your microphone.
Also, please attach screenshots of the Bandicam Recording settings window and Windows Sound settings window.
We look forward to hearing from you.
Thank you.