Apparently it works if the mic is enabled before the game starts. Some use 'Shut up 10' or similar, turning many settings off or disabling services. This is almost always a bad idea as software may then not work as expected. Make only necessary changes and understand that you run 'non-vanilla'.
Make sure the mic is not mute in hardware.
The posts above show how to 'enable' the mic. If there is a utility installed to 'mute' Windows 10, remove it would be my (general) advice.
When you say mic activated, how do you mean? Do you mean "not disabled" do you mean "allowed" by Windows privacy settings, or how? Thanks.
I assume (seeing as no timely response) you mean in the microphone privacy of W10
Enable microphone from the Sound Settings
The sound settings icon holds more than just the power to adjust the sound in your PC. To enable the microphone from the sound settings, perform the following tasks:
At the bottom right corner of the windows menu Right Click on the Sound Settings Icon
Scroll up and select Recording Devices
Click on Recording
If there are devices listed Right Click on the desired device
If you don’t see the installed microphone this is an indication that the microphone is disabled Right Click anywhere in the screen and select Show Disabled Devices
Select the microphone from the generated list
Click on Properties
At the bottom of the window under Device Usage use the drop-down list to select Use this Device (Enable)
Click on Apply
Click on OK
Ensure that the selected device is set to default. The green check mark outlined by a circle is the indicating symbol that the device is default.
Enable the microphone from Windows Settings
Settings in Windows get auto-changed all of the time. To go in and change the settings that allow the PC to access the microphone, complete the following steps:
Access Windows Settings by simultaneously pressing the Windows Key and I
Click on Privacy
On the left menu choose Microphone
In the microphone settings under Let apps use my microphone ensure that the indicator is set to On
If this indicator is set to Off switch it back on by clicking on the icon and moving it to the other side of the coloured portion.
Most users don’t know what to do when the Windows key stops working. Check out this guide and be a step ahead.