Hi. I'm David, and I'm happy to help you.
You can reinstall the Realtek audio driver by downloading the latest version from the support section of your computer or motherboard manufacturer's website.
If you don't know where to find the driver, please share a screenshot of your system information, and I'll help you find it.
- Press "Windows + R", type msinfo32 and press Enter.
Maximize the window and use the shortcut "Windows + Shift + S" to use the screenshot tool.
I await your reply.
Feel free to ask back any questions.