With regards to the buzzing, I have come across the odd video where this happens, and my usual cure has been to stop it and restart it.
As for the freezing, you say 'recently'. How recently ? If it is a matter of a week or two, I would suggest trying restoring your Windows using a restore point that dated from before this problem occurred. Be aware that if you do this, you will have all the updates to redo from that date, and as it is possible that one of them triggered the problem, re-install them one at a time.
If the buzzing is associated with the freezing, and the wording of your post does not make this clear, then I wouldn't worry about it.