(03-18-2015, 11:03 PM)LanceC Wrote: Perhaps try a new SD card. If the write-protect isn't working there might be a problem with the card you're using.
Write protect is in the card reader, not in the SD card.
There is info on how to stop Win 8.1. from doing this and how to repair a damaged card in the useful links in my signature line at the bottom of this post. However, none of my PC's is infested with Windows 8, so I haven't tried it myself.
Don't count on Microshaft fixing this bug in Windows 10. They haven't yet admitted that they committed a crime here, and have had plenty of chances to fix Windows 8.1 with their many patch Tuesdays since then.