Will Norton 360 identify keylogger or spy software that is installed by someone in my house or will it only identify keyloger and spy software that comes from the internet?
Usually, the only way to install a keylogger successfully on a Norton product is to add it to scan and sonar exclusions, which you should find if you look in the scan and sonar settings. If you do a search on the forum under keylogger, you will find a number of users with difficulty getting it installed. This is not to say it is impossible, but it is probably difficult to accomplish.