1.Download the iCloud Control Panel.
To enable iCloud on your Windows PC, first set up iCloud on your other devices, then install the iCloud Control Panel for Windows (Windows Vista with Service Pack 2 or Windows 7 required).
Download Here:
http://support.apple.com/kb/DL1455
2. Turn on iCloud.
From the Windows Start menu, choose Control Panel > Network and Internet > iCloud.
Enter the Apple ID you used to create your iCloud account and select the iCloud services you’d like to enable.
For mail, contacts, and calendars, you can use iCloud.com or Outlook 2007 or later.
3. Enable Automatic Downloads.
To enable automatic downloads for your music, apps, and books, open iTunes > Edit > Preferences > Store and select Music, Apps, and Books.* (Requires iTunes 10.5 or later.)