There are cases whre the iCloud folder on yopur Windows machine is not synchronizing with your account, no matter what.
There is a way to get out from this issue by cleaning up the iCloud configuration and let the client to set it up from scratch again:
- From the iCloud control panel sign out your account
- Go to %appadata%\Roaming\Apple Computer\MediaStream
- Delete all files and folders in MediaStream folder and restart the machine
- From iCloud control panel, log back in.
From this time forward, the iCloud service will re-synch your data from the cloud.