iCloud on Windows
Do I need to have a Mac to use iCloud on Windows?
I got an error message saying that I had to set up iCloud on a Mac or iOS before using iCloud for Windows (7).
Windows, Windows 6
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Do I need to have a Mac to use iCloud on Windows?
That questions answers itself. The current version of iCloud for Windows requires a PC with Windows 10.
I got an error message saying that I had to set up iCloud on a Mac or iOS before using iCloud for Windows (7).
The version of iCloud for Windows you tried to install may have been for Windows 10 which returned an error message. Apple also provides a link here for the installer for iCloud for Windows 7 and iCloud for Windows 8.
Hopefully that will work for you.