Windows 10 build 18312: Microsoft released today a new preview of Windows 10 with improvements to disk space management, a new Reset this PC, and an improved Windows Subsystem for Linux (WSL).
The update is Windows 10 build 18312. These builds come from the developing version 19H1, which will be released in the first half of 2019.
As you already know, Windows 10 is now being developed as a service, which means that the operating system offers new features on a regular basis. Microsoft has released six major updates so far: November Update, Anniversary Update, Creators Update, Fall Creators Update, April 2018 Update, and October 2018 Update.
The seventh update will change the way Windows 10 manages disk space. A place around 7GB will be left aside as "dedicated storage" only for single or aggregate updates, applications, temporary files, and temporary storage of new system updates.
The goal, according to Microsoft, is to ensure that critical operating system features are always accessible on disk. The backup will only work on computers that have 19H1 pre-installed or on computers where the 19H1 installation was clean and not upgraded.
Microsoft has also added a new setting to "Restore this computer" (Settings - Update & Security - Recovery or Settings - Update & Security - Recovery). The new setting requires fewer clicks and makes system reset easier.
This version also brings many new options to the WSL (wsl.exe) command line. You can see all the changes to WSL from issue notes.
Finally, this build increases the maximum allocation of time available in the Fiber Local Storage (FLS) editing process. This is useful for musicians working professionally with Digital Audio Workstations) This change will also have a positive impact on any application that dynamically loads hundreds or thousands of unique Visual C ++ runtimes DLLs.