my internet connection is so low, why?

is there something wrong with your device? if it isn't, then maybe because of the provider. you should ask to your internet service provider. i think they will give the solution. because sometimes most of the internet problems come from the provider.

I was having problem with my computer, running slow to so I took off the cover of my computer, where the fan is and it was loaded with dust, I had to get all the dust out of my computer because, the fan was working it self hard, and it sounded like it was forcing itself to work, then I downloaded me another browser, and now my computer works like I just brought it, I had this comoputer for 6 years.

You should check with your internet provider, they should know give your a technical support answer, because you paid for what you get. If you are not satisfied with them, you can always switch to another provider. You are the customer, the choice always on your side. Good luck!