Canon Powershot SD450 Digital Elph is a great digital camera that is loaded with 5.0 mega pixels CCD image sensor and can use different memory cards like Secure Digital (SD) or Multi Media card (MMC) memory card. The problem mentioned in your question is not new and the “ memory card locked ” error message is occur due to the corruption in SD/MMC card.

To solve this problem the simplest way is to format the memory card. But there is a thing that you should understand that all the content present over the media will be deleted and this will be the biggest shock for you if you have not made the backup of the memory card earlier. As per your situation it does not looks that you had enough time to do the backup. Now if you format the media, the pictures will be lost and so there is only one way that can help and take you out from this situation and it is named as Canon Photo Recovery.

Canon Photo Recovery is a strong professional photo recovery solution that is designed specially to recover the pictures from the memory cards that are compatible with the Canon Digital camera including Canon SD450 Elph Digital Camera.