I was using my PC everything was running smoothly I shut it down and next day I start my pc and no sound and the sound icon in the system tray has a red "X" to its right and says (no speakers or headphones are plugged in) and I tried my headphones and speakers on another PC and they worked so I dont know what the problem is I tried plugging them in every possible well hole ( by that I mean I tried the front and rear ones) to no avail and under device manager under "sound, video and game controllers" I can only find "Nvidia high definition audio" and under system devices there are two ones called "High Definition Audio Controller" the bottom one has a yellow exclamation mark next to it and under properties it says the device cannot start (code 10) and when I try to update it it says I have the latest drivers and uninstalling the drivers and restarting my pc didnt work either I even downloaded my motherboard's audio drivers and installed them manually but to no avail even when I search for realtek in the search bar "Realtek HD Audio Manager" appears with "control panel" written under it and when I click to start it nothing happens and troubleshooting didnt work either I have an H110M S2PH motherboard and I am using onbard audio (no dedicated sound card) and use Windows 10 I hope I was clear and detailed enough I really need immediate help as I cant use me PC without sound and thanks in advance for your responses (also I found a registry fix that told me to delete two registries called upper and lower something)