Hi Ali, I found a copy of the users manual online. The D101 does have a "protection" mode that prevents the accidental erasure of images. Under Troubleshooting it says that if you see the word PROTECT! on the display and it is blinking slowly, you are trying to erase a protected image. You will need to cancel the "protect" of image. To do this (turn this feature off) they suggest following these steps.
1. set the mode switch to Memory Card
2. Set the power switch to PLAYER
3. Using the FWD and REV arrows, search for the still image(s) that you want to unprotect
4. Press the MENU button
5. Turn the MENU DIAL to hightlight MEMORY and press the ENTER button
6. Turn the MENU DIAL to highlight PROTECT and press the ENTER button. Pressing the ENTER button will turn the PROTECT feature ON and OFF
7. Exit the menu by pressing MENU button.
Hope this helps.
