Microsoft today released a new Windows 10 preview for PCs with a small but important change to Windows Update. This build is from the RS4 branch, which represents the next Windows 10 update the company has yet to announce (but is likely to ship soon). There is no new build from the RS5 branch.

Windows 10 is a service, meaning it was built in a very different way from its predecessors so it can be regularly updated with not just fixes, but new features, too. Microsoft has released four major updates so far: November Update, Anniversary Update, Creators Update, and Fall Creators Update.

There is only one major addition in this release: Windows Update has been tweaked to be more proactive at keeping PCs updated. When Windows Update scans, downloads, and installs updates on a PC that is plugged in, it will prevent the PC from going to sleep when it has not been in active use for up to 2 hours. The goal is to “give Windows Update more opportunity to succeed,” the team explains.

This desktop build includes the following general bug fixes and improvements:

  • Fixed an issue where Settings would crash when you tried to open Themes.
  • Fixed an issue where the Settings tile didn’t have a name if you pinned it to Start.
  • Updated About Settings to include at a glance entries for the two new Windows Defender pillars (Account Protection and Device Security).
  • Fixed a typo in Storage Sense Settings.
  • Fixed an issue resulting in all dropdowns in Settings appearing blank until clicked.
  • Fixed an issue that could result in Settings crashing after having navigated to and left Sound Settings.
  • Fixed an issue where…

[SOURCE]