I recently acquired a raspberry pi with an 8GB micro SD card. (It has been running fine until today)When the card is in the PI and I try to boot it, it comes up saying that the card is corrupt/incomplete. I am trying to reformat the whole thing (as I don't have any files on the PI) but my windows7 PC with a SD card reader is not picking up the card.(Nor is the software for reformatting the SD card on the raspberry pi website. It freezes, and only starts responding when I take the SD card out of the computer.) In "My Computer" no disk is shown (or removable drive). The reader on the computer works perfectly well as it reads other SD cards in the same port.
I have been overclocking my PI at MEDIUM for a few days. It is model B.
Any help would be appreciated.