<p>The article<br>
<a href="https://www.neowin.net/news/the-windows-10-spring-update-no-longer-lets-you-disable-web-search-in-start">The Windows 10 spring update no longer lets you disable web search in Start - workaround</a> reports that the following registry update<br>
is required in Windows 10 version 1803 :</p>
<pre><code class="lang-auto">Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search]
"BingSearchEnabled"=dword:00000000
"AllowSearchToUseLocation"=dword:00000000
"CortanaConsent"=dword:00000000
</code></pre>
<p>It remarks :</p>
<p>those entries are completely missing from the “Search” registry key, so you can safely delete them should you want to revert.</p>
<p>I would still recommend to at least create a system restore point before doing<br>
any registry modifications.</p>
<p>A reboot might be required.</p>
<p>User <span class="mention">@mtd</span> has contributed below these commands for applying the updates to<br>
the registry:</p>
<pre><code class="lang-auto">reg add HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Search /f /v BingSearchEnabled /t REG_DWORD /d 0
reg add HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Search /f /v AllowSearchToUseLocation /t REG_DWORD /d 0
reg add HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Search /f /v CortanaConsent /t REG_DWORD /d 0
</code></pre>
<p>EDIT1 : There are reports that Windows 10 version 2004 has broken the above fix.</p>
<p>The article<br>
<a href="https://winaero.com/blog/disable-web-search-in-taskbar-in-windows-10-version-2004/">Disable Web Search in Taskbar in Windows 10 Version 2004</a><br>
has a summary of the current state of the problem.</p>
<p>The current solution seems to be to download and run this<br>
<a href="https://winaero.com/request.php?2378">PowerShell script</a><br>
as Administrator:</p>
<pre><code class="lang-auto">Set-ExecutionPolicy Unrestricted -Scope Process
.\disable-web-search.ps1
</code></pre>
<p>As only a workaround, this PowerShell script blocks the online search using<br>
Windows Firewall rules, so forcing the search to operate in offline mode.</p>
<p>EDIT2: Reports now say that these registry modification are working for<br>
Windows versions 2004 and 20H2 without reboot.</p>
<p>EDIT3: Win</p>
<p><em>(Réponse tronquée)</em></p>