l have clicked download/install multiple times and it takes forever, (l know it takes time but normally is much faster on my device) but when it finally hits 100%, it requests the restart for the update process, whenever my system is rebooted windows update says "Attention Needed" and the install failed.answers.microsoft.com
Microsoft has released a new version of Windows 11 through the Dev channel of the Windows Insider program, available via update KB5050636. Windows 11 Insider Preview Build 26120.2705 is a cumulative update for Windows 11 Insider Preview, which introduces several new features.
What’s New in Windows 11 Insider Preview Build 26120.2705
It introduces real-time translation of live subtitles for Copilot+ PCs powered by AMD and Intel processors. Live Caption launches the ability to translate 44 languages into English, including speakers in live video calls, recordings, and streaming content. Live translation is available on AMD and Intel®-powered Copilot+ PCs where English is the primary language. There are some situations you need to notice:
- Restart if you experience a crash when launching Live Captions. Some Insiders may experience a crash when launching Live Captions for the first time. If you experience this issue, restart and you won’t see it again.
- Stop audio when changing languages to restore captions or translations. If audio is playing or the microphone is enabled when switching languages, Live Captions will crash.
How to Install Windows 11 Insider Preview Build 26120.2705
Method 1: Via Windows Update
As mentioned at the beginning of the article, Windows 11 Insider Preview Build 26120.2705 was released to the Dev Channel. You can get it through the Windows Update, which can automatically download and install Microsoft Windows software updates over the Internet. Here is how you can do it.
Step 1: Press the Win + I keys to open the Settings app.
Step 2: In Settings, click on Windows Update from the left pane.
Step 3: In the right pane, click on the Check for updates button to detect the available update.
Once it is detected, you need to click on the Download & install button to install it.
Method 2: From ISO Files
Particularly large programs such as Microsoft Office and Windows operating systems are available as ISO files. You can mount the ISO file as a virtual drive and install the software from there. You can download and install this preview build from this link.
How to Fix Install Error Windows 11 Insider Preview 10.0.26120.2705
Windows installation failure sometimes happens. Many reasons can cause the install error in Windows 11 Insider Preview 10.0.26120.2705. How to fix the install error? You can get your device out of the insider program to fix the issue. Here is a way.
Step 1: Download and install Windows 11.
Step 2: Right-click on the Start button and choose Run to open the Run dialog.
Step 3: Type regedit in the box and click on OK or press Enter.
Step 4: When prompted by the UAC window, click on Yes to continue.
Step 5: Type the following address in the address bar and press Enter to locate the WindowsSelfHost folder:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsSelfHost
Step 6: In the right pane, right-click on the file and choose Delete to delete it.

Step 7: Close the Registry Editor and restart your computer to see if this issue is fixed.
Step 8: Double-click or right-click the downloaded ISO file and select Mount.
Step 9: On the new virtual drive run setup.exe to start in-place update to do in-place repair to go to the released version 24H2.
Now you may be able to run the release version of Windows 11 24H2.
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Final Words
This post fully explains to you the new improvements in the Windows 11 Insider Preview Build 26120.2705, how to download and install it, and how to fix the install error. If you want to have a better understanding of this update or fix the related issues, this comprehensive guide will be your best choice.