My SD card is really screwed up and I don't know how it got that way. I seem to have this problem while experimenting with homebrew. Anyway I have an SD reader built into my computer and when I stick the SD card in and go to open it explorer locks up everytime. I would usually right click on it in My Computer to reformat but even when I right click on it it freezes explorer and I have to restart it. Any tips on how to format my card?