[SD Card write protected when formatted?]

How can I get my SD cards unlocked, (key on the side is unlocked) My digital cameras' when reformatting with them made it so they are write protected. I have tried using regedit and it hasnt work they are still write protect. How come each digital camera can reformat the cards to their specs and go over the write protection but my computer cant? I have 3 different digital cameras sitting in front of me and each one can reformat the 4gig SD card. Again please someone help me....

 

Thanks yes it does it all all my cards, I think its the way I am trying to format within the PC. I am using my Canon MX870 Printer and I noticed in the settings that there is a setting called read/write attribute its set at Not Writable from PC. I do not know how to change this setting I have tried and tried but it will not change. I wanted to format a 4GB card so I can install Win7 onto my ACER MINI since there is no cd drive i have to use a flash card. Thanks for any comments.

 

PeteC, I have installed that program and I still can not get it to format. I think the problem lays with my printer since I am using that as the card reader. There is a setting on it that says read/write attribute its set at Not Writable from PC. I am not sure how to change it, I have tried and it wont change. Its a Canon MX870 and I have had it for alittle while. It used to work before but for some reason its not working now. It will not work on any of my SD cards. Also I am trying to put Win7 on a 4GB SD card so I can install it onto my Acer Mini. Thanks for any and all help...

 

yeah I dont have a card reader, except for the ones located on my laptops. I used the mini and was able to reformat now I just need to get Win7 loaded onto the card. Got a good support link for that? Thanks again....