Microsoft today released two new Windows 10 previews for PCs. The first building is from the RS5 branch, which represents the Windows 10 update, which the company plans to release later this year, and the other is from the 19H1 branch, which, as the name suggests, appears in the first half of next year.
It's rare that the Windows Insider program gets two new buildings on the same day (last time was in March), but it's happening more often today than in previous years. Microsoft becomes more comfortable developing two updates of Windows 10 at the same time.
Windows 10 is being developed as a service, which means that it receives new features on a regular basis. Microsoft has released five major updates so far: November Update, Anniversary Update, Creators Update, Fall Creators Update, and April 201
Windows 10 build 17723
This RS5 building introduces a mixed reality feature called flashlight that lets you peer into your physical environment without removing the headset. With this building, you can view the real world at any time via the Start menu, shortcut or voice command. The function opens a low latency review camera power that is connected to the controller.
Edge has received new group policies and MDM settings for IT administrators. On the flipside, Edge has lost the XSS filter, which Microsoft feels is no longer necessary thanks to modern standards like Content Security Policy. Edge also adopts Unicode 11 and its 157 new emoji.
This building also provides improvements in time itself. There is a new leap of secondary support (keeping UTC synchronized with average solar time), a precision time protocol (delivering far more accurate end-of-life tests) and software stimulation (eliminating software link introduced by the Windows network stack). 
There is now a simplified assigned access configuration page (Settings => Search for "Assigned Access" => "Configure a Newsstand") that allows device administrators to easily set up your PC as a kiosk or digital character. Furthermore, Edge now works with assigned access so IT administrators can create a tailored browsing experience designed for kiosk devices: digital / interactive signage, public view, public view and normal mode.
When it comes to updates, Microsoft says that it has trained a predictive model that can accurately determine when the right time to reboot the device. Windows 10 will not only check if you use your device before restarting for an update, but also try to predict if you just left the device for a few minutes.
When it comes to gaming, Microsoft makes it easier to access the Game Bar. You can now discover Play Bar from the Start menu or download Play Bar by using the Win + G shortcut at any time.
This desktop base contains the following general fixes and improvements:
- Fixed an issue that resulted in the "…" menu not working in multiple apps (including Microsoft Store, Images, and Screenshot) by clicking on any of the items just would make the menu rejected.
- Fixed a problem where in some cases on multi-monitor PCs, all the windows may have occurred "up" and mouse input goes to the wrong place.
- Fixed a problem where the SNMP and Windows Event Log service can start using an unexpectedly high amount of CPU in the last flow.
- Solved the problem with Windows Defender Application Guard no longer works after installing Build 17713.1002 Cumulative Update.
- Fixed a problem from the last float there, at restart to start the upgrade to the building, the system would boot
- Fixed a problem that resulted in upgrades to the previous building that failed with error 0x8007001f.
- Fixed a problem from the previous flight that Windows Recovery Environment (WinRE) did not start and resulted in "Reset this PC" and "Advanced Startup" streams are broken and appear to do nothing.
- Fixed a problem that resulted in some laptops experiencing a CRITICAL PROCESS DIED error checkup when the PC was put to sleep by closing the lid and disconnecting power disconnected.
- Fixed a problem that caused ShellExperienceHost.exe to crash when you try to associate apps to the Start menu via drag and drop.
- Fix an explorer.exe crash when you launch the Standard Apps Settings page via WIN + R & # 39; control / name Microsoft.DefaultPrograms / page pageFileAssoc & # 39 ;.
- Fixed a problem where .mkv files used a generic app icon in File Explorer instead of a thumbnail.
- Delivery optimization settings now have a new IC.
- Fixed an issue where suggestions on the Settings main page will appear after a delay so that the Settings tabs are changed unexpectedly.
- Fixed a problem where notification settings listed all possible quick actions in Enable / Disable Quick Actions section, even those that do not apply to the PC being used (including two Focus Assist Entries).
- Fixed a problem where the systray overflow area could end up drawing a little below the taskbar.
- Fixed a problem that resulted in the network state of the taskbar that may become obsolete in newer buildings (showing that there was no connection when it was and vice versa).
- Fixed a problem where pinging PCs with names on the same LAN would do a case-sensitive name check.  Fixed a problem where using the v6v4tunnel to establish a tunnel did not work.
- Fixed a problem in command prompt from previous flight, where a written string burst around to another line, you can only delete it up to his line changes.
- Fixed a problem that resulted in Task View / Timeline crashes on launch for some Insiders in newer buildings.
- Fixed an issue where right-clicking an activity in the Timeline lacked the option "Remove All From Day".
- When you open a PDF file using Microsoft Edge, the activity will now be listed in the timeline.
- Fixed a problem where sometimes you will see windows unexpectedly rearrange after completing task view without selecting a window.
- Fixed a problem from newer buildings where the clock in the taskbar leaked graphics device context handles (HDC) every time it rescheduled, resulting in performance issues, the longer a PC drove. Multiple factors can affect performance, so if you continue to notice any problems after upgrading to this construction, please sign feedback including a performance track with a brief repro and description.
- Fixed a problem that resulted in being unable to distinguish between two overlapping command prompt windows.
- Made the Welcome Screen to the previous string "These updates will protect you in an online world."
- Tweaks to the design of the Cortana & Search landing page, especially in situations where Cortana is not enabled / supported.
- Fixed a problem that resulted in Microsoft Jigsaw hanging on launch in newer buildings.
- The Microsoft Edge Settings Menu ("…") is now acrylic. 19659013] When you right-click a book in the Microsoft Edge Books pane, you will now see an option to share the book.
- Fixed a problem that could result in spell checking of Microsoft Edge, even if spell checking is disabled in n Settings.
- Fixed an issue where the use of the mouse disc in Microsoft Edge would unexpectedly make a forward / back through browser history if the focus was in the address bar and "Do not scroll active windows" was disabled.
- Fixed a Problem There When using specific locations to listen to music in Microsoft Edge, the mouse may experience a small freeze if it moves when the song changes.
- Fixed an issue that caused apps like Adobe XD to crash keystrokes in the latest aircraft.
- Fixed a problem that could lead to a deadlock on specific devices after using the pen for ink.
- Fixed an issue where the touch keyboard still wants a launch animation, even though "Show animations" were turned off under Easy Access.  Fixed a problem that started regedit.exe (or any .exe requiring height) from a non-elevated cmd window using the startup command, causing the "parameter is incorrect" error.
- Solved a problem that causes Narrator speech to fade when you wake up from sleep.
- Fixed an issue where the error "Your fingerprint could not be recognized. Try using another finger." Displayed unexpected characters instead of apostrophe.
In the RS5 section, this update strikes Windows 10 build number for PCs from 17713 (available to testers on July 11th) to build 17723.
This building has 14 known issues:
- The clock and calendar migration can does not appear before you have Startup or Action Center (and both appear simultaneously). The same problem can also cause notifications to appear before Start or Action Center is opened.
- You can see some unexpectedly bright colors on these faces when in dark mode and / or dark on dark text.
- When upgrading to this building, you find that the taskbar (network, volume, etc.) no longer has an acrylic background.
- Using Ease of Access Make text larger, you may have text clip problems or find the text
- When you configure Microsoft Edge as your kiosk and configure URL / URL for Start / New Page from Assigned access settings, Microsoft Edge can not be launched with the configured URL. The solution to this problem should be included in the next flight.
- On Build 17723 (but not Build 18204) you can see the notification alert icon with the extension icon in the Microsoft Edge toolbar when an extension has unread notifications.
- On Windows 10 in S mode, launch of Office in Store may not start with an error if a .dll is not designed to run on Windows. The error message is that a .dll is also not designed to run on Windows or it contains an error. Please try reinstalling the program again. "Some people have managed to work around this by uninstalling and installing Office from the store. If that does not work, try installing a version of Office not from the store.
- When the Quick Start for the Teller starts, Scan Mode can not be trusted by default. We recommend that you go through Quick Start with Scan Mode on. To confirm that Scan Mode is on, press Caps Lock + Space.
- When using scan mode, you may experience more stops for a single check. An example of this is whether you have a picture that is also a link. This is something we are working actively with.
- If the Narrator key is set to just Insert and you try to send a Narrator command from a Braille, these commands will not work. As long as the Caps Lock key is part of Narrator Key Scheduling, Braille Functionality will function as designed.
- There is a known problem in automatic dialog where the title of the dialog is spoken more than once.  For more information about Narrator-New keyboard setup and other known issues, see (Intro to New Narrator Keyboard Layout doc).
- There is a problem where the peaks of apps in tablet mode are being cut (i.e., missing pixels).
- If you install any of the latest buildings from the fast ring, switch to slow ring – optional content so that developer mode fails. You must remain in the Quick Ring to add / install / enable optional content. This is because optional content will only install on buildings approved for certain calls.
Windows 10 build 18204
This 19H1 building is for Windows Insiders who have chosen the Skip Ahead option, which means they continue to receive building from the RS_PRERELEASE department. Only a small subset of Insiders can choose to skip, since Microsoft still needs testers that help RS5.
There is not much difference between these two buildings, beyond their branch. The first building has an additional problem, as mentioned above, but it's about it. To move forward, of course, the two will be deviated since RS5 bugs are squashed and the 19H1 gets new features.
Do not install rather build on your production machine.