I'd be suspicious of the hardware. The "lock" tab on the card works like
the write protect of a floppy disk. The position of the lock tab is
detected by the card reader. It may be defective.
The only thing I can suggest it try them in another computer to verify.
"Andreas Y." <ayiangoullis@xxxxxx> wrote in message
> All of a sudden, my HP laptop cannot write to any of my sd cards. It says
> they are write-protected although they are not. I can write to my cards on
> cameras but not on my laptop. I have tried the trick with the tape but it
> doesn't work as it seems the trouble is on the laptop. I have tons of
> on my laptop and it's big trouble to restore it. Is it actually Windows
> issue or hardware?