On a Mac, open iTunes. Select Store and then View Account. Enter your password. Under iTunes in the Cloud, click Manage Devices. Remove each device connected to your account by clicking Remove next to it. Click Done after you’ve finished removing all of the devices linked with your account. Unauthorize this computer using Store.”
Sign out of iCloud on your Windows PC. Open System Settings and Apps and Features. Locate iCloud, press the uninstall key, then follow the on-screen instructions. If you installed iCloud Mail in Outlook, locate iTunes from below to do the same with it.
Sign in to iCloud and scroll down to Devices. Select a device, then Remove from Account. In addition, you can use the removal request code as an email contact for Apple customer support.
On the bottom left, click Users & Groups. Select the padlock icon. Enter your password. On the left side, pick an admin user and then hit the minus sign near the bottom. Select a choice from the list and then hit Delete User.
What is the situation with iMessages on my iPhone? I fully erased my phone and put it into DFU mode, but the Messages app still says “Attempting to restore iCloud lock from backup…”. That’s not what happened. When you wiped the drive, your iCloud registration token for that device was also destroyed. The only remnants of yours?
