HP 935 5.1mp digital camera. Error message: "SD card is locked".Need a cure to take pictures again.

I have an HP 935, 5.1MP. If no one can answer this question, I will
have to throw this camera in the trash can. HP wants $35 just to say
Hello to me. This is like throwing money down the toilet. The only
thing that they want to talk to me about is selling me a used
(refurbished) camera for just a few bucks less than what I paid for this
one. And yes, they are telling me to throw away this camera. Some
customer service!

The camera will no longer take pictures anymore. It's _neve_r been
dropped, and has been used approx 4 times during a two year period. The
camera now tells me that the SD memory card is locked (which it isn't).
A brand new memory card produces the same results.

Does anyone know how to "unlock" the memory cards? I need a fix for
this camera. I am not talking about the switch on the side of the memory
card. This is a software error, or the sensing switch for the card is
not functioning.

Thanks