I suggest you go to rim's website and download a copy of 4.6 desktop manager, choose the save option and save it to your desktop. Uninstall the DM on your PC, then double click the 4.6 DM and install it. Then try to plug in and back up your berry. Then download, save and then install your new OS. I always recommend saving these files and then installing them. They are large and when one chooses run, there are often problems. I always get and use the one without media manager because it is slow> it is easier to drag and drop media files onto your device in my computer.