This preview update does not include security updates but still brings many bug fixes and quality improvements.
you might download and install KB5037849 from Windows Update.
However, many users said that KB5037849 could not be installed successfully.
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Here is an example:
If KB5037849 fails to install, the approaches below may help.
Want to update Windows 11 21H2 to the latest version but encounter the KB5037770 fails to install issue?
Here are some useful fixes.

Here are the major steps to run it.
Right-click theStartbutton and chooseSettings.
Then go toUpdate & Security>Troubleshoot>Additional troubleshooters.

In the new window, hitWindows Update>execute the troubleshooter.
After that, it will start to detect potential issues and resolve them automatically.
Fix 2.
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Perform the DISM and SFC Scans
Corrupted system files may also render update failure.
In this case, you could run theDISMandSFCtools to repair the system files.
In the Windows search box on the taskbar, typecmd, then selectRun as administratorunderCommand Prompt.

In the pop-up command line window, typeDISM.exe /Online /Cleanup-image /Restorehealthand pressEnter.
Once the restore operation is completed successfully, typesfc /scannowand pressEnter.
Wait for the SFC command to complete, then go to Windows Update and reinstall KB5037849.
Fix 3.
Use Windows Update Assistant
Windows Update Assistant is a tool for downloading and installing Windows 10 feature updates.
If you run into some issue notification when installing KB5037849 from Windows Update, you might use this tool.
Go to theWindows 10 update download page, then hitUpdate nowto download the Windows Update Assistant tool.
After that, you should follow the instructions on the pop-up window to get the newest Windows version.
What is Windows X-Lite Optimum 11 24H2?
How to get this system downloaded and installed?
Here is the tutorial.
Fix 4.
Resetting Windows update components can solve these problems.
Fix 5.
So, facing the KB5037849 not installing issue, you’re able to download the update package manually.
First, visit theMicrosoft Update Catalog, then search forKB5037849by using the search box.
On the scan result page, click theDownloadbutton next to your Windows version.
Next, hit the link from the pop-up window to download the .msu file.
Once the .msu file is downloaded, run it to install KB5037849.