The iCloud setup offers you configure and install iCloud Drive, iCloud Photos, Mail, Contacts, Calendars, and Tasks and Bookmarks. You can select what you want during the set up.
If you want to uninstall iCloud from your Windows 10 PC, here is how to do it.
Method 1 of 2
Uninstall iCloud installed from Windows 10 Store
Step 1: Go to Windows 10 Settings > Apps > Apps & features page.
Step 2: Look for iCloud entry and click on the same to reveal the Uninstall button.
Step 3: Click on the Uninstall button and then click the Uninstall button again when you are asked for confirmation to uninstall iCloud and other services offered with iCloud.
This will remove iCloud and other services (like Photos) offered with iCloud.
Method 2 of 2
Uninstall iCloud installed from Apple
Follow this method if you downloaded the iCloud installer file from Apple and manually installed it.
Step 1: Before uninstalling iCloud from your computer, we recommend signing out of iCloud desktop client on your PC to avoid any data loss that might occur if you uninstall iCloud when files are being uploaded.
To sign out of iCloud, launch iCloud and then click on the Sign out button located at the lower left bottom of the iCloud dialog.
Step 2: Head over to Settings > Apps > Apps & features page. In the apps list, look for the iCloud entry. Note that you can use the search on the same page to quickly access the iCloud entry.
Step 3: Select the iCloud entry to reveal the Modify button. The Uninstall button is greyed out. But do not worry about it!
Step 4: Click on the Modify button.
Step 5: In the resulting iCloud dialog, select the Remove radio button and then click on the Next button.
Step 6: You will get the following confirmation dialog, next. Click on the Yes button to begin uninstalling.
If you get a dialog “Sign out of iCloud before uninstalling iCloud for Windows,” click on the Uninstall anyway button to continue uninstalling. If you want to sign out first, click the Open iCloud button and then sign out.
Step 7: If you click on the Uninstall anyway button in the previous step, you will get the following dialog with “Uninstalling iCloud for Windows while signed in may cause data loss” message.
Step 8: To continue the uninstallation, click the Uninstall iCloud button. The iCloud program will be removed from your computer in a few seconds. Once done, click on the Finish button to exit.