Hello Minimartzz,
Please check the methods below:
Open Control Panel → Hardware and Sound → Realtek HD Audio Manager.
Control Panel
In Realtek Audio Manager, select "Device advanced settings" in the top right.
Select "Separate all input jacks as independent devices" and click OK.
(If you don't see an option to separate jacks, you may need to update your Realtek Audio drivers.)
Device advanced settings
Open Control Panel → Hardware and Sound → Sound → Recording
Set your internal microphone as the default recording device.
I hope this helps! Please let me know if you have any further concerns.
Sincerely
John DeV
Independent Advisor