Originally Posted by vadiml
I have NO other devices connected to calibre....
Are you sure you don't have a device charging via USB on your computer (iphone or other)? Do you have calibre setup to Connect to a folder on startup?
Do you have your Galaxy Note connected to your computer USB when this happens? If so did you answer Yes to the "Do you want calibre to manage it?
" question (see attached)? You have to answer No to that question if you want Calibre Companion to manage your connection to calibre.
If you don't see the question attached have you previously setup the User defined USB driver? If so you must disable that driver.
Post the data that chaley requested and we should know what the problem is.