Hi
My first fix for issues like this it to go to Device Manager and Uninstall the Sound Device.
Next reboot your computer and Widows will detect, find the drivers for, and reinstall the device.
9 times out of 10 this will fix the issue.
To uninstall the device, find it in the Audio Inputs and Outputs category.
Right click on it and select Uninstall.
You may multiple devices, so you need to know which one you speakers are plugged into.
Mike