To enable iCloud on your Windows PC (Windows 7 or 8 required), first set up your iCloud account on your other iOS devices or Mac, then install iCloud for Windows.
Open iCloud for Windows and sign in with the Apple ID you used to create your iCloud account. Select the iCloud services you’d like to enable and click Apply.
When you enable iCloud Drive and Photos, iCloud for Windows creates new folders for those files in Windows Explorer. And when you save new files in those folders, the files will also automatically appear on your other iOS devices.