I use Ubuntu and VirtualBox and creates a virtual machine with Windows 10. When watching a video, the audio was awful. It looked like he was stuttering and slowing down. So, I checked with the playback of a video on another device, the other device started to advance. So I have no idea what causes it, but it seems like my processor is stuttering. I have no idea what's going on because I'm really new to this field, so any help would be welcome. Thank you.