Hi there, I'm John D, and I am an independent advisor.
I'm sorry to hear about the loud buzzing noise coming from your Windows 10 computer. I understand how frustrating and distracting it can be to work under such conditions.
You mentioned that you have tried searching the web and using various apps, but none of them worked. One thing that could help is checking the power supply unit and the fans of your computer. Faulty power supplies and dust buildup can sometimes cause buzzing noises. You can clean the fans using a can of compressed air, or a technician can help with a more thorough cleaning.
If these solutions do not work, it may be best to take your computer to a professional technician for a more in-depth analysis.
I hope this information helps, and please let me know if there is anything else I can do to assist you.
Best regards,
John D.
Independent Advisor