Why displayed "Search for app in the Store?" when an execution file is double-clicked.

Hoshima13 1 Reputation point

I created a desktop client application and distributed it for some peoples.
One of them reported following message was displayed when he double-clicked the app to start.
He selected "No" and the app normally started.

Search for app in the Store? You need to install an app for this task. Would you like to search for one in the store?

Would you tell me why the message displayed?
I tried following work around and finally resolved the problem.
But I don't understand the root cause.

< Work Around >

  1. Right-click the execution file and select "properties".
  2. At "General" tab, check the box "Unblock" next to the text below.

This file came from another computer and maybe blocked to protect this computer.

  1. "Apply" > "OK"
  2. After this operation, the message above is not displayed.

< Environment >
Edition: Windows 10 Pro
Version: 21H2
Install Date: 2022/02/09
OS Build: 19044.1526
Experience: Windows Feature Experience Pack 120.2212.4170.0

Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
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