iPad Pro 12.9 3rd Gen. Won't Update 15.5

KDJJ13 Said:

"iPad Pro 12.9 3rd Gen. Won't Update 15.5: I connected to a fresh iTunes download on a Windows 10 machine and when attempting to perform the update it says "downloading of your update failed for unknown reason, code1667 (maybe the wrong code the screen went away and I can't find it again'.[...]"

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Updating your iPad Using a Computer:

You can use a Mac for this as well. So, try doing this using another available computer. See my User Tip: Making Use of a Computer for Updating an iOS Device - User Tip

IMPORTANT:

Backup your iPad First:

Be certain you create a backup of your iPad, prior to the log out, that way you'll have something to restore your iPad from should you need them back.

If your iPad is capable of being updated to a more recent version of iOS/iPadOS than is currently installed, these support pages outline both the available methods by which the update can be performed - and troubleshooting should you experience difficulties:

Update your iPhone, iPad or iPod touch – Apple Support

If you can't update or restore your iPhone, iPad or iPod touch – Apple Support

If your iPhone, iPad or iPod touch won’t update - Apple Support

iOS update and restore errors – Apple Support

Be aware that while an iPad may be capable of update, it may be too far behind the current version to be updated directly from iPad settings. In such circumstances you will likely need to use a computer to perform the update. You will need access to either a PC (with iTunes installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS). Ensure that your installed version of iTunes has been updated to the most recent version; the essential device drivers are included.

Download and use iTunes for Windows – Apple Support

Update to the latest version of iTunes – Apple Support

Update software on iPhone, iPad or iPod touch in iTunes on PC - Apple Support

If you have a beta profile installed, ensure this has been removed from your iPad - as, otherwise, installation of production software updates may be inhibited. This support page provides the necessary information to remove the beta from your iPad:

How to uninstall iOS beta software - Apple Support

You should note that for your iPad to install an available update, its battery must be charged to at least 50% capacity - and/or be connected to its Power Adapter. Similarly, the iPad can only be updated over a standard WiFi connection - or be updated by a PC or Mac using iTunes or Finder - over a USB connection.

You might also visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) - where the technicians will be able assist with performing the update:

Genius Bar Reservation and Apple Support Options - Apple