Motherboard: MSI B150M Mortar GPU: Radeon R7 370 CPU: Intel Pentium G4400 RAM: 16GB OS: Windows 7 64-bit Hello, So my PC has been giving me a headache lately despite being built not so long ago. The primary issue: no sound comes through the speakers/headphones. It occurred after I turned my PC off and later on again. Things I have already done: tested headphones with other devices; they work. checked for any windows updates; last one was weeks ago. I reinstalled the audio drivers Run tests for malware; none found I have an SSD and an HDD. The HDD was installed only recently as extra storage. It keeps disappearing randomly and usually reappears after restarting. However, after I added the HDD, sometimes after I try to start the computer, it just gets stuck on the "start/welcome" screen and disconnects the keyboard and mouse (the LED lights disappear when disconnected). I don't know if it's related to the sound, but I appreciate any help I can get. Thanks in advance.