When your audio sounds terrible after upgrading your PC – the sound is distorted, the bass is lacking, there’s screeching and chirping– it’s time to troubleshoot your problem and get it fixed. What do you do if, after upgrading, your computer’s audio sounds bad or has extremely low volume? Windows 10 is the latest version of Microsoft Windows, and well worth upgrading to. Realtek HD Audio Low and Bad Quality Sound After Windows 10 Upgrade Driver Support/ knowledgebase/ Realtek HD Audio Low and Bad Quality Sound After Windows 10 Upgrade.