This issue has occurred for me as well as for my sister whose Nook I'm trying to get back to stock. It says "Installing update...E:Error in /data/media/NookHD-factory-2.1.1-plainstock.zip (status 6) Installation aborted) This was a new download I just got from Lepinlar. Same thing happens when I tried flashing back to MY 2.2.1 stock before the KitKat OS worked finally. Her Nook runs CWM10 and mine ran CWM11 and I used an 8gig SD card that had previously worked for me before. Thanks guys!!