I have a SP3 i5 256gb with a UAG case. My fan runs once in a while when I am just browsing the web. Is this normal? Sometimes it's on full blast. It's really loud and you can feel the air blowing pretty hard. Is it my case that is causing it to overheat? When I am on youtube or playing games the fan turns on too but that's normal. I do not think just browsing the web should make the fan turn on.