After using the 8GB Explore X2 with no problems for a month in my Canon S3 IS, I was greeted with the "Memory Card Error" message today. Unlike many of you, I lost no pictures because, up until today, they have uploaded onto this Windows 7 machine with no problems. I loved this card! But now, as I have read here, the card is not recognized by my computer. I sent a note to support as was suggested. But, what have you done to get the card to work again? I don't need to recover any pictures. I cannot do anything with the card as my computer cannot see it. On the Canon, "Format" is grayed-out and will not function. I guess it thinks it is a locked card (?) Those of you who contacted Support, what did they say?