Windows 10 build 19564 hits Fast ring with new Calendar app, more

What you need to know

• Windows 10 build 19564.1000 is now available to Insiders on the Fast ring.
• This build brings several improvements alongside a new Calendar app and more.
• Fast ring Insiders can download this release now via Windows Update.

Microsoft launched a new Windows Insider build for testers on the Fast ring today. This latest release pushes Windows 10 up to build number 19564.1000, and it includes a several improvements. The biggest rollout, however, is a new look for the Windows 10 Calendar app, which is rolling out alongside this update.

The new Calendar app includes 30 different themes to choose from, along with an improved month view and easier event creation. Microsoft also redesigned the account navigation in the app, and there's now a toggle that will let you switch between the new and old Calendar app looks with a tap.

Here's a full look at what's new and improved in build 19564.

What's new in build 19564

• Graphics Settings Improvements: We've updated the Graphics settings page (Settings > System > Display > Graphics settings), allowing for better control over designating which GPU your apps run on. With this update, the app list and GPU preference are pre-populated on a best effort basis to improve the default preference management experience. If your desired app isn't pre-populated, you can still add it by using the app selection drop-down.

Preview the new Calendar app on Windows 10

• We've been working on an improved version of the Calendar app for Windows 10 and the preview is now available to Windows Insiders! Here is a sneak peek of what's new in the preview:
  • New themes: choose from over 30 different themes!
  • Improved month view: Month view now includes an agenda pane that lets you see your day's events at a glance.
  • Simplified event creation: We've made it even easier to add an event to your calendar.
  • Redesigned account navigation: We've collapsed the account navigation pane, leaving more space for your day's events. All of your syncing calendar accounts are now represented as clickable icons on the left.
• You can try the preview by going to the Calendar app and selecting the toggle to try the new experience. Don't worry, you can always switch back at any time! We are excited to hear what you think of the new experience.

General changes, improvements, and fixes for PC

• We fixed an issue resulting in East Asian IMEs (Simplified Chinese, Traditional Chinese, Korean and the Japanese IME) potentially being missing from the language/keyboard switcher (e.g. opened by Windows key + Space key) after upgrading from 20H1 Build 19041 or lower builds to Windows 10 Insider Preview build (19536 or later). Please note that this fix will stop it from happening, however, if you were already impacted from a previous build, you'll need to remove and re-add any keyboards that are missing from the keyboard switcher by going to Settings > Time & Language > Language > Preferred languages, in order to get yourself back into a good
• We've updated the Japanese IME so that when using the new Microsoft Edge in inPrivate mode, this will also enable private mode in the IME.
• We fixed an issue from the previous flight where if you brought up clipboard history (WIN+V) and dismissed it without pasting anything, input in many places would stop working until you rebooted your PC.
• We fixed a rare crash when opening the Windows Ink Workspace.
• We fixed an issue that could result in the Wheel UI (that you'd see when using a Surface Dial) crashing when no custom commands had been configured.
• We fixed an issue that could result in the login screen password field unexpectedly not rendering.
• WSL Issue 4860: We've fixed an issue resulting in some Insiders experiencing this error message when using WSL2: A connection attempt failed on Windows.
• We've resolved one issue preventing some Insiders from updating to newer builds with error 0xc1900101. We're continuing to review logs to further investigate additional issues with this error code.
• We fixed an issue with the Windows setup UI (that you would see when using an ISO, or if prompted to fix issues impacting Windows Update, such as low space) where the apostrophe in "you're" was replaced by junk characters.
• We fixed an issue resulting in certain devices no longer sleeping on idle in recent builds.
• We reduced TLS usage in certain shell components. What does that mean for you? Basically, we made things take a little less memory, which also helps certain apps that are sensitive to TLS usage.
• We fixed an issue resulting in a small set of Insiders seeing their system time unexpectedly jump forward.
• We fixed a crash resulting in some Insiders seeing a green screen with a CRITICAL_PROCESS_DIED error message.
• We fixed an issue that could result in a deadlock (where everything would freeze) when using your PC.
• We fixed a crash some Insiders were hitting in EoaExperiences.exe when using the text input cursor indicator.
• We fixed an issue resulting in not being able to set focus to the search box in the common file dialog when launched from remote desktop connection settings and certain other apps.
• We fixed an issue where File Explorer wasn't calculating the correct folder size in Properties when the UNC path was longer than MAX_PATH.
• We fixed an issue where the banner at the top of Settings might say an update was in progress, even though Windows Update Settings would say you're up to date.
• For Insiders that have the Settings header, you may notice the OneDrive icon has been updated with today's build.
• We fixed an issue resulting in Settings crashing when selecting sync across devices > Get Started under Clipboard.
• We fixed an issue with wallpaper transitions on Build 19536+, which was affecting some third-party wallpaper apps.

For more on this release, you can check out Microsoft's full blog post. Otherwise, if you're already enrolled in the Fast ring, you can pick up build 19564 now via Windows Update.