Just bought a new Kobo Aura One. When I connect it to my PC (Windows 7 Professional SP1 64 bit), system sees it but says 'file system unknown'. have contacted Kobo support, but all their solutions don't work. A friend of mine, software technician, suggested to disable Norton auto-protect, and when I disabled it my PC connected immediately. Have tried again to reconnect with auto-protect enabled, and again 'file system unknown'. How come? My other reader, another Kobo Aura but much older, has always connected with no problem. What kind of solution can you suggest? Thank you