So, everytime i join a net work it starts at 4 bars, then it takes the web page foreve to load, then the signal strength drops, until 1 bar. it does this on a any network, but it's fixed by turning wifi off and then back on, it's becoming a big pain. Also, usually later at night, my fan (while running itunes and pages) the fans will turn up to about 4-5000 rpm's and the temps for everything sky rocket.. i am still under apple care. PS, i have asked this before, but i needed to double check about changing my hdd, will it void my warranty?? and how do i do it? is there a guide on how to transfer the data?