Microsoft rolled out a new Windows 10 version 1709 cumulative update earlier today, and now it looks like systems still on the original release of the operating system are getting their own patch too.

Windows 10 version 1507, which was released in July 2015, is provided with cumulative update KB4077735, which just like its Fall Creators Update sibling, is focused on addressing performance issues.

In this case, Microsoft says the update addresses an issue where “WPF will sometimes consume a high percentage of CPU when the console session is not active, and a non-console session is active.”

No other changes are introduced by this cumulative update, though it’s worth mentioning that only systems enrolled in LTSB (long-term servicing branch) are getting it. Support for the original version of Windows 10 has already ended, and Microsoft only ships cumulative updates and security patches to LTSB devices. Home users need to update to a supported version of Windows.

One known issue

On the other hand, this update does come with a known issue, and Microsoft says that a patch would only be included in a future cumulative update.

The company explains that after installing Windows 10 update KB4077735, some users might no longer be able to log into some websites with third-party account credentials in Microsoft Edge browser. No workaround is available just yet, so users need to either switch to a different browser for this or delay installing the update.

As with any other cumulative update, there are concerns that it could fail to install, though at this point, we’re not aware of such issues experienced on systems that received it. We’ll update the article should such problems be reported.

KB4077735 is not offered via Windows Update, and is only available as a manual download from Microsoft’s Update Catalog page here. A system reboot is required after installing it.