Memory card problem

[kn76cbr]

Took my camera out and instead of clearing  the card I use most I just stuck in another one, took about 50 shots, got home and tried to load them on my lap top but windows wants to format the card. The shots are viewable in camera but nowhere else. I'm thinking I did't format the card in camera before using it but can I recover them in anyway so windows can view them?

Message was edited by: kn76cbr

[robox3000]

Is it possible that the new card is Mac formatted or another proprietary format?

Have you ever used this card on the computer that you are now trying to read it on?