Why does iTunes keep popping up on my computer and I can’t get out of it

Hey Lindamicu,

Have you checked to see if iTunes shows in your login items? Applications in this area will automatically open when signing in to your user account. Here's more information on login items and how to remove them, if needed: Open items automatically when you log in on Mac - Apple Support

"Add or remove automatic items

1. On your Mac, choose Apple menu  > System Preferences, then click Users & Groups.
2. Select your user account, then click Login Items at the top of the window.
3. Do any of the following:

• Add a login item: Click the Add button  below the list of items, select a document, folder, app, server, or other item, then click Add.
• Remove a login item: Select the name of the item you want to prevent from opening automatically, then click the Remove button  below the list.
• Hide a login item: If you don’t want an item’s windows to be visible after login, select the Hide checkbox next to the item. 
  • Note: Hide does not apply to servers, which always appear in the Finder after login."

If that's not the case, let us know more:

• Are you connecting a device to your Mac when iTunes opens?
• When iTunes opens and you're asking to sign in, does it accept your password? Please do not share any personal information, including your passwords here.

Keep us posted.

Take care!