How to fix the common issue of Windows 11 Installation Assistant not opening?
Take it easy and you could find solutions from this post on theMiniTool website.
That is, you canupgrade Windows 10 to Windows 11with this Microsoft tool.

To get this tool, you’re able to clickDownload NowunderWindows 11 Installation Assistanton theMicrosoft website.
Then, you’re gonna wanna run Windows Installation Assistant as administrator.
However, sometimes you may meet the common problem Windows 11 Installation Assistant not working.

The usual situation is that this tool opens and closes immediately.
This issue seems to be common in insider builds of Windows 11, particularly with Dev insider builds.
Step 3: ChooseWindows 7from the drop-down menu.
Step 4: ClickApplyto save the change.
If you dont want to use an insider dev build, Windows 11 clean install is a final solution.
To know more operations, you might refer to our previous post How to Reinstall Windows 11?
Try 3 Simple Ways Here Now!
Final Words
Is Windows 11 Installation Assistant not opening?
If you have any other methods to fix the Windows 11 Installation Assistant problem, tell us.