Hi Saliboop,
I'm sorry to hear you are having these issues with iTunes on your Windows 10 machine. If you are having issues with iTunes launching automatically when you restart your computer, you may want to check or try the following things:
• Check to see if iTunes or anything iTunes related is listed in the Autostart menu (Task Manager > Autostart); disable if there is
• In iTunes > Settings, check to make sure that iTunes isn't set to automatically sync with devices, and make sure no devices are plugged into your computer when restarting
• You may want to consider downloading Microsoft's AutoRuns for Windows. Microsoft describes it as having "the most comprehensive knowledge of auto-starting locations of any startup monitor, shows you what programs are configured to run during system bootup or login, and when you start various built-in Windows applications like Internet Explorer, Explorer and media players."
• You may also want to check and see if you have Plex Media Server software installed; there have reports from other users that this software can cause autolaunching in iTunes 12.2. The reported resolution for this is to enable the
Share iTunes Library XML with other applications option is selected in iTunes > Preferences > Advanced.
Thanks for using the Apple Support Communities.
Cheers