I like to keep file extensions hidden because I know office fiies, pdfs, jpgs, etc so I have no need to see the extensions. Once in a while for some reason, the "hide file extensions for known file types" box in the folder option of the control panel unchecks itself. No big deal I just fix it.
But today, the file extensions insist on staying. I check the box, click apply and ok and close the control panel. Only the extensions remain visible. I reopen the control panel and the box is unchecked again. Can anyone help solve this?