A recent Windows update added new permissions that have to be enabled for the mic to communicate with your computer properly. 

• We recommend navigating to your Settings > Privacy > Microphone and making sure that everything is enabled for use with the mic. 
• Access your Sound Menu to confirm that the Blue Mic is recognized on the list. Access your Sound Menu by right clicking on your Speakers/Volume icon and selecting “Sounds” or typing “Sounds” into your Windows Search box. 
• Click the Recording tab and right click on your Blue Mic to select Set as “Default Device”. 
  • If there are other Ready devices, please disconnect the device or disable the microphone by right clicking on the device and then selecting Disable.
  • Other devices like webcams or headsets could interfere with your Blue Mic.
  • Disconnect your Blue Mic, wait three seconds, then reconnect your Blue Mic to finalize the changes.
  • On the Recording tab double click on the Blue Mic to open the Properties Menu.
  • Select the Levels tab then select an appropriate volume level (start at midway point of the slider & adjust from there) and make sure that the speaker icon is not muted.
    • The main input/gain control can be adjusted on your microphone Gain knob (if available)