Windows 11 Insider Preview Build 26120.1252 Released

Windows 11 preview version Build 26120.1252 (KB5038603) has been released, and the Dev channel internal test personnel can upgrade their experience! This article will describe the new features of this update, fixes issues, and solutions to installation failures.

About Windows 11 Preview Build 26120.1252 (KB5038603)

Microsoft has released the Windows 11 preview version Build 26120.1252 (KB5038603) update for Dev channel internal testing personnel, which mainly improves the service technology of Windows 11 version 24H2.

Improvements and fixes for Windows 11 Build 26120.1252

This KB5038603 update contains the following improvements:

• Drag the Start Menu app to the taskbar: Now you can directly pin the app in the Start Menu to the taskbar by dragging it.
• File Explorer Address Bar Drag and Drop: Supports dragging and dropping files between path breadcrumbs in the File Explorer address bar.
• Lock screen interface weather information: The weather and other information functions of the lock screen interface have begun to operate.
• Taskbar widget button improvements: Taskbar icons are clearer, and some animation icons are larger in size.

Fixed the issue:

• Fixed an issue that could cause explorer.exe to crash when leaving homepage navigation.
• Fixed an issue where the pinyin input method was displayed twice in the list of available input methods during Windows Settings (OOBE).

For more repair details, please refer to the official blog: Announcing Windows 11 Insider Preview Build 26120.1252 (Dev Channel).

How to get Windows 11 Build 26120.1252 (KB5038603)

The Dev channel update is based on the Windows 11 24H2 version and is provided through the enable package (Build 26120.xxxx). To get the latest updates as soon as possible, go to Windows Update Settings, enable the Get the latest updates as soon as possible option, and check for updates.

What to do if Windows 11 Build 26120.1252 (KB5038603) installation fails?

If the KB5038603 update installation fails, you can try the following:

Method 1: Troubleshooting for Windows Update

Troubleshooting Windows Update is a built-in tool for Windows that helps you resolve Windows update issues.

Step 1. Open Start > Settings > System > Troubleshooting > Other Troubleshooting .

Step 2. Click the Run button next to Windows Update in the right panel. The Windows Update Troubleshooter will automatically run and fix the discovered issues.

Step 3. Return to Windows Update Settings, check for updates, and check whether KB5038603 can be installed successfully.

Method 2: Delete old Windows update files

Previous Windows installation files may cause update failures. If the above method does not work, you can try to delete the old Windows update file.

Method 3: Run CHKDSK

Step 1. Run the command prompt as administrator.

Step 2. Enter chkdsk C: /f in the command prompt and press Enter to run.

Step 3. The system will prompt: Chkdsk cannot run because the volume is in use by another process . Enter Y and press Enter.

Step 4. Restart the device and CHKDSK will run and find and fix the problem.

If necessary, restore lost Windows 11 files

If you need to recover lost or deleted Windows 11 files, you can try using a data recovery tool such as MiniTool Power Data Recovery.

Summarize

To get Windows 11 preview Build 26120.1252, try the methods in this article. MiniTool Power Data Recovery helps you recover lost files if needed.

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