Photo Stream Not Syncing

My Photo Stream stopped syncing on Windows 7, and https://discussions.apple.com/message/22857409#22857409 fixed it. Specifically,

1. End the processes ApplePhotoStreams.exe and Applephotostreamdownloader
2. Delete everything in C:\Users\(user)\AppData\Roaming\Apple Computer\MediaStream\

I want to add: you don't have to restart your computer. After force-quitting the processes, in iCloud Control Panel the Photos checkbox will be unticked. Tick it and Apply, and you're good to go.

Note: Consider making labels "iCloud" and "Photo Stream".

Update 11 Dec 13
Photo Stream still stops working regularly, but it happily keeps adding "iCloud Photos" to my Favorites.