KB3081438 cumulative update contains all the fixes included in previous KB3081436 and KB3081424 updates. If you’ve trouble installing first or second cumulative updates or both, released by Microsoft recently for Windows 10, try to check for updates and install the third Cumulative update for Windows 10: August 14, 2015 (KB3081438), this update is now available on Windows Update.
Windows 10 Cumulative update KB3081438
KB3081438 page says” This update includes improvements to enhance the functionality of Windows 10.
Windows 10 updates are cumulative. Therefore, this package contains all previously released fixes. If you have previous updates installed, only the new fixes that are contained in this package will be downloaded and installed to your computer.”
That means if your Windows 10 has missed KB3081436 and KB3081424 updates, installing this one is suffice. For those who’ve those two updates already installed, only new fixes will be downloaded and installed on your computer.
If you’ve issues installing the update via Windows Update, here are the direct download links for the KB3081438.