<div dir="ltr"><div><font color="#666666" face="Arial, sans-serif">Hi Louis,</font></div><div><font color="#666666" face="Arial, sans-serif"><br></font></div><div><font color="#666666" face="Arial, sans-serif">This is likely caused by a Windows update. Ask your IT and see if they have pushed a new Windows update to your system. And you are right, it is Windows defender blocking some of those DLL. Check the report from your virus scanner software and see what files have been flagged. If they are from QGIS installation directory, you can whitelist them and then try again and see if the application runs.</font></div><div><font color="#666666" face="Arial, sans-serif"><br></font></div><div><font color="#666666" face="Arial, sans-serif">Kind regards</font></div><div><font color="#666666" face="Arial, sans-serif">Saber</font></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, 18 Dec 2025 at 15:04, Louis Creamore via QGIS-User <<a href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg1548674595322803555">
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To whom it may concern,</div>
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I have recently successfully been using QGIS 3.40.13 with no issues. However, as of today whenever I go to launch I receive these error messages:</div>
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<img size="12117" style="width: 307px; height: 137px; max-width: 1123px;" height="137" width="307" id="m_1548674595322803555image_1" src="cid:ii_19b320f377bcb971f162"></div>
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<img size="13013" style="width: 298.616px; height: 203px; max-width: 1123px;" height="203" width="298" id="m_1548674595322803555image_2" src="cid:ii_19b320f377bcb971f163"></div>
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<img size="119559" style="width: 489.819px; height: 246px; max-width: 1123px;" height="246" width="489" id="m_1548674595322803555image_0" src="cid:ii_19b320f377bcb971f161"></div>
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I am not sure why this may being caused and I have tried various work arounds including, resetting my profile, uninstalling and reinstalling the same version of QGIS, uninstalling and reinstalling QGIS version 3.44 and also installing and uninstalling via the
OSGeo4W installer all of which have not fixed the issue.</div>
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I am led to believe that the issue may be due to the application having been blocked by windows smart app control. I am reticent to turn this off unless it is a last resort especially as the same version of QGIS (3.40.13) was working correctly over the previous
days. I am not sure what could've changed. Any advice on how to proceed would be kindly appreciated.</div>
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Best wishes, </div>
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Louis</div>
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</div></blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><span><table style="color:rgb(34,34,34);border:none;border-collapse:collapse"><colgroup><col width="131"><col width="206"></colgroup><tbody><tr style="height:96pt"><td style="border-bottom:1.5pt solid rgb(58,46,38);vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline"><span style="border:none;display:inline-block;overflow:hidden;width:110px;height:110px"><img src="https://lh7-rt.googleusercontent.com/docsz/AD_4nXfRShNz3_eaBwmELBh6Hs7NISwJ0zBAxXuQRdfMTx_KVwquAkDNsfSKlWCAD8EybEacpoT8D-Ad_6aPTn6ZinwLy8yenLedZcL_kN2QhKMps99TX9RprZSUz62v-PKGspTi1sYOMg?key=Jeb2bYt9w71cI5NxZsG4pEQm" width="110" height="110" style="margin-left: 0px; margin-top: 0px;"></span></span></p></td><td style="border-bottom:1.5pt solid rgb(58,46,38);vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:13pt;font-family:Arial,sans-serif;color:rgb(0,0,0);background-color:transparent;font-weight:700;vertical-align:baseline">Saber Razmjooei</span></p><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(102,102,102);background-color:transparent;vertical-align:baseline">Co-Founder</span></p><br><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><a href="http://lutraconsulting.co.uk/" style="color:rgb(17,85,204)" target="_blank"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;vertical-align:baseline">lutraconsulting.co.uk</span></a></p><br><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline"> </span><a href="https://www.linkedin.com/in/saber-razmjooei/" style="color:rgb(17,85,204)" target="_blank"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;vertical-align:baseline"><span style="border:none;display:inline-block;overflow:hidden;width:20px;height:20px"><img src="https://lh7-rt.googleusercontent.com/docsz/AD_4nXd-3nSSZboZbZSIGiTp73Ozx31KSI7AbhDKGZ81W0DJ_P1BZpenwIUStbXjOV163hSfCvthvBVB800Mv3A0DLnKiXVjCFCRS2DI1xIy7nluSZwyqofUNSSjgyZAx5WowWiporGU?key=Jeb2bYt9w71cI5NxZsG4pEQm" width="20" height="20" style="margin-left: 0px; margin-top: 0px;" alt="https://www.linkedin.com/in/saber-razmjooei/"></span></span></a><span style="font-size:11pt;font-family:Arial,sans-serif;color:rgb(0,0,0);background-color:transparent;vertical-align:baseline"> </span><img src="https://lh7-rt.googleusercontent.com/docsz/AD_4nXfYoSmPP0wTWr2uNEJLnWTQriFM7yw6Yx67z0lzAbv2MElfGvAIGSM-95hu65e4tYm-XGVL0I3oLdcyw4uUCim9-H1S0ajfdoNV0VWj1bwLOI8KAk2-_sBWN_hSpe5w6qukE1J8sg?key=Jeb2bYt9w71cI5NxZsG4pEQm" width="20" height="20" style="margin-left: 0px; margin-top: 0px;"> <a href="https://www.youtube.com/@LutraConsulting" style="color:rgb(17,85,204)" target="_blank"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;vertical-align:baseline"><span style="border:none;display:inline-block;overflow:hidden;width:20px;height:20px"><img src="https://lh7-rt.googleusercontent.com/docsz/AD_4nXcw8vIlzwnam9KCAL7KEQvBL2hmQrtO0p9Vs75AIP1ouSLFr8SIuHQTg3VD5UPONIxhpHmH1B2lX8s1Bryl3qiEd4_U2yiiYQxhhmy63yT8h0Eua4N3vVv0eMFnw26Jh7elQhnm?key=Jeb2bYt9w71cI5NxZsG4pEQm" width="20" height="20" style="margin-left: 0px; margin-top: 0px;"></span></span></a><span style="background-color:transparent;font-size:11pt;font-family:Arial,sans-serif;color:rgb(0,0,0);vertical-align:baseline"> </span><a href="https://github.com/lutraconsulting" style="color:rgb(17,85,204)" target="_blank"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;vertical-align:baseline"><span style="border:none;display:inline-block;overflow:hidden;width:20px;height:20px"><img src="https://lh7-rt.googleusercontent.com/docsz/AD_4nXfg4gx274581StgEzMK155DxfmkmhrSRDSL7rPkPRmxhAMzSE8qlWwODdpAnoXaUPeztgveka9xMzeoZgRG6WhOOXYlXHdTt3G3xcEV6qmJyoAvd_68a-PuYRlJtjz3W9qf0MPGFA?key=Jeb2bYt9w71cI5NxZsG4pEQm" width="20" height="20" style="margin-left: 0px; margin-top: 0px;"></span></span></a></p><br></td></tr><tr style="height:97.5pt"><td colspan="2" style="border-top:1.5pt solid rgb(58,46,38);vertical-align:top;padding:5pt;overflow:hidden"><p dir="ltr" style="line-height:1.2;margin-top:0pt;margin-bottom:0pt"><a href="https://www.lutraconsulting.co.uk/" style="color:rgb(17,85,204)" target="_blank"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;vertical-align:baseline"><span style="border:none;display:inline-block;overflow:hidden;width:286px;height:72px"><img src="https://lh7-rt.googleusercontent.com/docsz/AD_4nXe0Io9HMThCizzuxbck8VC3bSvirqbu5_YM1auYWKb9euO0qOHZc-JiT9kNkbcSICUsAnFpIh1AcPpaK5iRNR9bxIm5gO0M0V_49Bi_DeXXbdff16Zf_4_4xLuGsLPoTgJkauA_pw?key=Jeb2bYt9w71cI5NxZsG4pEQm" width="286" height="72" style="margin-left: 0px; margin-top: 0px;"></span></span></a></p></td></tr></tbody></table></span></div></div></div></div></div></div></div>