Hi AkashH -
I'm Kevin B. Independent advisor and a Windows user like you. I do apologize for the inconvenience that you experiencing right now, let me help you sort things out.
Multimedia Audio Controller is connected to the Sound driver of your computer. Updating the sound card of your computer should resolve the issue with the Multimedia Audio Controller
Kindly follow the steps below and check if it helps resolving the issue.
Run the updates on your computer - running the updates will check all the current installed driver on your computer and will download any latest updates available
Press windows key + I
Click on Updates & Security
Click on Check for updates
Wait until windows fetches all available updates and install all updates
Restart the computer if needed
If the above method did not work, try to manually uninstall the driver and let Microsoft install the driver manually
Press windows key + X
Select Device Manager
Under Other Devices, Right click on the Multimedia Audio Controller and select Uninstall then click OK
Click on Action tab and select "Scan for hardware changes" (Windows will reload the multimedia audio controller)
Locate and expand the "Sound, video and game controllers"
Locate the Multimedia Audio Controller or the Audio driver installed on your computer
Right click on it and select Update Driver
Select "Search automatically for updated driver software"
Windows will check for any available updates for your audio and will install it
Once done, close the device manager and restart the computer
Check if everything works fine
Hope this will help and have a bless day!
Thanks.
Kevin B.
Independent advisor