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<blockquote data-quote="Andy Ful" data-source="post: 1107698" data-attributes="member: 32260">I found a bug in CIS 2025. After unticking two settings in File Reputation, CIS blocked its GUI itself (cis.exe blocked). After the Windows restart I can see:[ATTACH=full]286205[/ATTACH]Diagnostics did not fix the issue, so I ended up in CIS without GUI (cannot revert the settings).Those settings were:<ul>
<li data-xf-list-type="ul">Trust applications trusted by trusted vendors</li>
<li data-xf-list-type="ul">Trust files installed by trusted installers</li>
</ul>Fortunately, most users will not do this. I tried to check if those settings are responsible for not containing DLL hijacking. <img class="smilie smilie--emoji" loading="lazy" alt="⛔" title="No entry&nbsp; &nbsp; :no_entry:" src="https://cdn.jsdelivr.net/joypixels/assets/6.6/png/unicode/64/26d4.png" data-shortname=":no_entry:" /> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite109" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />Edit.It seems that the issue is related to the setting &quot;Trust applications trusted by trusted vendors&quot;.&nbsp; It also prevented CIS reinstallation. I did not manage to uninstall CIS via a dedicated CIS uninstaller or Revo Uninstaller.&nbsp; I restored the VirtualBox image and applied &quot;Trust applications trusted by trusted vendors&quot; again. The same issue. The only way to reinstall CIS was by using &quot;Killing Comodo&quot; (which runs TDSSKiller to kill Comodo) and next uninstalling Comodo via Revo Uninstaller (Advanced scan). After this, I managed to install CIS again.</blockquote>

[QUOTE="Andy Ful, post: 1107698, member: 32260"] I found a bug in CIS 2025. After [COLOR=rgb(184, 49, 47)][B]unticking[/B][/COLOR] two settings in File Reputation, CIS blocked its GUI itself (cis.exe blocked). After the Windows restart I can see: [ATTACH type="full" alt="ciserror.png"]286205[/ATTACH] Diagnostics did not fix the issue, so I ended up in CIS without GUI (cannot revert the settings). Those settings were: [LIST] [*]Trust applications trusted by trusted vendors [*]Trust files installed by trusted installers [/LIST] Fortunately, most users will not do this. I tried to check if those settings are responsible for not containing DLL hijacking. ⛔ :) Edit. It seems that the issue is related to the setting "Trust applications trusted by trusted vendors". It also prevented CIS reinstallation. I did not manage to uninstall CIS via a dedicated CIS uninstaller or Revo Uninstaller. I restored the VirtualBox image and applied "Trust applications trusted by trusted vendors" again. The same issue. The only way to reinstall CIS was by using "Killing Comodo" (which runs TDSSKiller to kill Comodo) and next uninstalling Comodo via Revo Uninstaller (Advanced scan). After this, I managed to install CIS again. [/QUOTE]

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