Yeah, like Twiggy said, if you PC doesn't have a built-in SD card reader you'll need to buy an external one that you plug into your usb port. They're pretty inexpensive, I picked one up at Target the other day for like 8 bucks c:
You can get a decent card reader cheap that sticks into a USB port. I don't like the word "jam" when it comes to something like this, but with one of those, you can gently, delicately, lovingly insert your SD card.