Hi I now have Windows 10 and upgraded my Norton AV to suit. All fine for two days and now Norton won't start at boot up. Have to wait until hard disc not being thrashed by OneDrive, Dropbox, etc and then start it manually. On initial set up of Norton AV for Windows 10 I was able to specify when Norton started, e.g. at boot time, but this option now seems to have disappeared. Reluctant to uninstall/reinstall because Windows 10 has self modifying software which changes some files to read-only and even the administrator can't change them back to full control. Had bad experience with email because of this. Anyone got any ideas? Cheers, David