Quite while ago, iCloud was installed and updated on both Windows 7 and windows 8.1 computer.
I see both iCloud drive and iCloud photo folders in windows 7. But iCloud drive (its icon and folder) is missing in windows 8.1 computer. In iCloud control panel on windows 8.1, I could not tick in the box in front of the iCloud drive. Sometime I could tick it. but the check mark disappears when the icloud control panel is re-open. Any suggestion would appreciated.