Hello I have been using this laptop since January and have never used an SD card in it. i just tried today and none of the 3 that I tested showed up in My Computer. I originally had windows 8 on this , but I installed Windows 7 instead. Is this a driver issue or a problem with the hardware? USB works fine and I have another computer that works with sd cards fine so it's not that big of an issue but it would be easier if this just worked... Any ideas?