Step 1. Start by going to your control panel… Start > Control Panel… as seen Above in image 1.
Step 2. Now depending on how you view your control panel, categorically or by icons, what you see will be slightly different. And there is an extra step if viewing by category. Above is what you will see if you are viewing icons… simply click Sounds. And proceed to step 5.
Step 3. Click Hardware and sound… then…
Step 4. Click Manage Audio Devices
Step 5. You will now see the Sounds properties screen. Click on the recording tab, then select your audio input device, and click Properties. The Microphone properties screen will open. Select the Levels tab and adjust your level! Simple as that.
How-To and screenshots contributed by Heretical G. Reposted with permission.