so heres the thing, my laptop fan has being going crazy last couple of days, its been really loud and never had anything like this before. If i lift the laptop it will stop it , but if i sit it on anything it will do it again, i have tryed lifting it in awkward positions such as the bottom half of laptop up in air etc. Its not sittin on anything warm, i mean simple things like wooden and metal tables. Is this a sign of overheating ? It does it straight away though so not like after its been sitting for hours .. is there anything else that can be causing this ?