Does it contain only fixes listed as above or it releases all
features/fixes released in previous Fast Rings?
It contains the features released in the previous builds for Fast rings.
When i search it on wikipedia it shows this update contains below
The version 10.0.14342.1004 contains only the bug fixes as you told. But you must remember that Windows 10 updates are cumulative. This means that if you are installing the update 14342.1004 you will recieve all the features released before that build along with the update. Wikipedia is showing only what that particular build has fixed.
This is how slow ring works
For example, the build 14342.1001 was released for Fast rings. It adds new features to the OS. Now the bugs will be idenfied and fixed and the update 14342.1004 is released. This particular update will only contain bug fix.
Now this build is released for Slow rings. The update 14342.1004 will include all previous updates as updates are cumulative. So you will get the features introdced in 14342.1001.
How does it happen?
Windows 10 updates are cumulative. This means that a later update will contain all previously released updates which are not yet installed.
So how do get the complete change log?
If you want to know the complete change log, do the following,
- Identify which build are you running by viewing in the about page of settings. (consider it as 14356.1001)
- Go to wikipedia and check all the builds after 14356.1001 till the build number mentioned in the update(14356.1004).
- If there are 2 builds released in between them then you will get all the features intorduced in those two builds along with the bug fixes.