Got my refurbished macbook last friday and I'm really enjoying it, but I'm somewhat bothered by my very erratic internet speeds. At times, I can get the full 10Mbps that my cable modem is supposed to deliver, but at other times I've tested through speedtest.net as low as 1-2 Mbps. Interestingly my uploading strength seems to stay consistent. I generally notice speed dropping gradually during the day, especially if I've downloaded a large amount of data, such as wirelessly transferring gigs of data from my old Dell when I was setting the Macbook up, and yesterday downloading the MacHeist bundle. At it's very worst the computer would momentarily stop connecting to my router, although when it connects, the signal strength has always been the full four bars Even after appearing to drop due to overwork/heating, if I move closer to my wireless router, I get back to full speed again. My router is a Linksys 802.11g router located in the room directly below mine. I should also note I never had these sorts of problems with my old Dell laptop, which was located in the exact same spot. Thanks in advance for the help/advice.