Notebook Audio

Hi, I've been facing this issue for a long time and tried everything (troubleshooting, updating drivers, uninstall and reinstalling driver, virtual agent manual troubleshooting, searching in forums for similar issue etc. etc.) My laptop's sound decreases on it's own and it's really annoying and become so low that I can't hear anything. I have to use headphones or external speaker to listen to any audio. As mentioned above, I've tried everything to solve this issue but it's same. I even updated windows thinking it might solve the issue but of no use. Now, I don't have enhancement tab on sound properties. I have installed the latest driver available on hp website but the issue still exists. The sound volume remains okay for couple of minutes and decreases on it's own even if sound level is "100". I'm attaching the picture of all setting and driver details. Also, on the events tab, it says "requires further installation" and I have no idea what further installation it requires. Please help me fix this issue as I'm facing this for a long time and tried everything but this issue still exists.