I've been having this problem for a few months now. Every time I insert an SD Card into my laptop's SD Card reader, it gives me a message saying the SD Card is corrupted. Then, when I scan the SD Card, it says there are no problems. I've tried this on 3 separate SD Cards, and it happens every time. If it helps, all 3 are SanDisk SDHC. Any suggestions for why this is happening would be nice. If not, eh, I can live with it.