Strange weired Intermittent Background Sound in my laptop speakers

on Désinfection by ****

Hi friends,

 

I need your help. Since 1 month, I heard a strange weired Intermittent Background Sound in my laptop speakers. Also my computer is unusually very slow. I suspect an infection.

please tell me what to do, what to clean, what tool i have to download. I used a CCleaner, but still the same.

any help from you guys will realley appreciated.

 

thank you