Error 8 installing icloud for Windows 10

Hello CJ_3044,

Welcome to Apple Support Communities. 

We understand that you are not able to install iCloud for Windows. and you don't have enough storage to update your iPad. We are happy to help.

These steps may help. Please try the steps here: If you can't download or install iCloud for Windows - Apple Support

"If iCloud for Windows doesn't download or install from the Microsoft Store

To install iCloud for Windows 11 or later, make sure that you:

1. Update your version of Windows to the May 2019 Update or later. Learn more about the minimum system requirements for iCloud for Windows.
2. Set up a Microsoft account. You can create one on the Microsoft website.
3. Know your Apple ID and Apple ID password. Learn what to do if you forgot your Apple ID password or need to find your Apple ID user name.

For general upgrade and installation fixes, visit the Microsoft support site."

We recommend trying these steps if you need more space to update your iPad: If you need more space for an update on your iPhone, iPad, or iPod touch - Apple Support

"Manage space on your iPhone, iPad, or iPod touch

To make space on your device, try the recommendations. You can also delete or offload apps and content. You don't need to purchase more iCloud storage. What's the difference between device storage and iCloud storage?

1. Go to Settings > General > [device] Storage.
2. Scroll to the Recommendations section to see tips.
3. If you still need more space after you use the recommendations, you can delete apps and content that you don't need. Scroll to the list of apps, then select any app to see how much space it uses.
4. Tap Delete App. Some apps, such as Music, let you delete parts of their documents and data. You can redownload your purchased apps and content again later. 
5. Try to install the update again. Go to Settings > General > Software Update.

If you see Other or System Data in the graph that shows your device storage, you don't need to take action to change them. Instead, delete apps and content that you don't need, and use the recommendations.

Use your computer to update your iPhone, iPad, or iPod touch

1. On a Mac with macOS Catalina or later, open the Finder. On a Mac with macOS Mojave or earlier, or on a PC, open iTunes.
2. Plug your device into your computer.
3. Locate your device on your computer. You might need to trust your device to continue.
4. Click Check for Update.
5. Click Download and Update.

If an alert appears during an update, learn how to resolve an error or alert."

Let us know if you have further questions.

Take care.

Hello CJ_3044,

Sounds good. Please keep us posted. We're standing by.

Cheers!