Mở iTunes. Nhấn Edit (Chỉnh sửa). Nhấn Preferences… (Tùy chọn). Nhấn tab General (Chung). Bỏ chọn ô "iCloud Music Library" (Thư viện nhạc iCloud). Nhấn OK.

Given the above summary, write a detailed text in English for it.
Click or double-click the iTunes app icon, which resembles a multicolored musical note on a white background. If prompted to install an update, do so before before proceeding. It's a menu item at the top of the iTunes window. A drop-down menu will appear. On a Mac, you'll click iTunes in the top-left corner of the screen. This is at the bottom of the drop-down menu. The Preferences window will pop up. It's at the top of the Preferences window. You should see this at the top of the window.  If the box is unchecked, iCloud Music Library is disabled on your computer. If you don't see this box, iCloud Music Library isn't available for your account. It's at the bottom of the Preferences window. Doing so will save your changes and remove any saved Apple Music songs from your library.