If you have v-sync enabled you shouldn't be having screen tearing issues, v-sync off will give you screen tearing issues if you don't have g-sync / freesync setup.
For audio issues try enabling Audio Sync in the audio settings. Make sure your Audio Latency is not set too low.
Your audio driver should be set to xaudio but try others to see if you have better luck with other drivers.
Also are you running any shaders or none ? Certain shaders can put a lot of stress on the system and cause just enough slow down to cause audio problems but it sounds like your system shouldn't have that problem.
Are you running the 1.3.6 stable build or nightly ? Nightly builds can bring in problems.
Since you are on a laptop check your performance settings in the control panel, check that you are running in performance mode and not one of the power saving modes.