Microsoft has started testing a new Windows 10 cumulative update, this time around included in the Insider program for Release Preview users running version 21H2 builds.

The brand new update is KB5006738, also it boosts the OS build to 19044.1319.

"This update will be offered automatically for Windows Insiders already on Windows 10, version 21H2 in the Release Preview Channel. For Insiders not on Windows 10, version 21H2 - this update is provided via our "seeker" experience in Windows Update and just to Insiders who were moved from the Beta Channel towards the Release Preview Channel as their PC didn't meet the hardware requirements for Windows 11. This means these Insiders will need to go to Settings > Update & Security > Windows Update and choose to download and install Windows 10, version 21H2," Microsoft explains.

What's new within this update

In terms of what's new in this update, there are plenty of fixes and improvements, including a new feature that should make it easier to transfer data in one browser to a different.

Most of the alterations in this build are specially targeted at enterprises, though consumers might also be pleased to discover Microsoft managed to resolve a glitch resulting in the lock screen to look black if the slideshow option was enabled.

Microsoft says it has also resolved an essential memory leak on Windows 10.

"We fixed a memory leak issue in lsass.exe on domain controllers within the forest root domain that occurs when you've multiple forests and multiple domains in each forest. The SID-Name mapping functions leak memory whenever a request comes from another domain within the forest and crosses forest boundaries," the organization explained.

Keep in mind that this new update is just love Release Preview users, so all improvements included here will be available for production devices at another time.