Hi thankyou for looking at my post 

I recently bought a new PSU from someone, as my old one made lawn mowing noises after 20 seconds when starting up my PC after taking it to this person he was convinced that it was a hardware  issue and i bought a new one well everything was fine but just after 4 months the noise has started again.

The new psu that i bought was  brand new from wholesales i dont know the brand yet but i can find out, 

After Turning it off and then back on again it seems to take away the noise but it is definitely showing the symptoms of my previous PSU which ended up heating and making noises every time.

I was wondering if it could be a software related issue? Like maybe my Os is not starting up properly

research suggests that i open up and clean my PSU but i am skeptic as a power supply 3 months old in good Enviroment will need cleaning 

Any help, suggestions will be appreciated thanks!!!