Windows 10 build 19042.804 rolls out to Beta and Release Preview Insiders
Beta and Release Preview Insiders have a new build to grab of Windows 10.
What you need to know
- Microsoft recently released a new build of Windows 10 to Insiders in the Beta and Release Preview Channels.
- The build includes several fixes and security updates.
- The update does not contain any new features.
Microsoft rolled out a new build of Windows 10 to Insiders in the Beta and Release Preview Channels yesterday. The update brings PCs to build 19042.804. The build doesn't include any new features but does include several bug and security fixes.
Here are the key changes, as outlined in a blog post from Microsoft:
- We fixed a possible elevation of privilege vulnerability in the win32k component.
- We fixed an issue that might damage the file system of some devices and prevent them from starting up after running chkdsk /f.
- We fixed a security vulnerability by preventing applications that run as a SYSTEM account from printing to "FILE:" ports. To address this issue in the future, make sure your applications or services run as a specific user or service account.
- Security updates to the Windows App Platform and Frameworks, Windows Apps, Windows Input and Composition, Windows Cloud Infrastructure, Windows Management, Windows Authentication, Windows Fundamentals, Windows Cryptography, Windows Virtualization, Windows Core Networking, and Windows Hybrid Cloud Networking.
You can read more about the build, including known issues and workarounds, on a Microsoft support page.
Microsoft also has more details about the security updates and fixes that you can find in its Security Update Guide.
The new build will roll out to Insiders running the Windows 10 October 2020 Update, which includes Insiders in the Beta and Release Preview Channels who are on 20H2.
All the latest news, reviews, and guides for Windows and Xbox diehards.

Sean Endicott is a news writer and apps editor for Windows Central with 11+ years of experience. A Nottingham Trent journalism graduate, Sean has covered the industry’s arc from the Lumia era to the launch of Windows 11 and generative AI. Having started at Thrifter, he uses his expertise in price tracking to help readers find genuine hardware value.
Beyond tech news, Sean is a UK sports media pioneer. In 2017, he became one of the first to stream via smartphone and is an expert in AP Capture systems. A tech-forward coach, he was named 2024 BAFA Youth Coach of the Year. He is focused on using technology—from AI to Clipchamp—to gain a practical edge.
