diff --git a/app/sovran_systemsos_web/static/css/security.css b/app/sovran_systemsos_web/static/css/security.css
index 7f8448c..ead06e8 100644
--- a/app/sovran_systemsos_web/static/css/security.css
+++ b/app/sovran_systemsos_web/static/css/security.css
@@ -215,6 +215,33 @@
   min-width: 70px;
 }
 
+/* ── Security Reset full-screen overlay ──────────────────────────── */
+
+.security-reset-overlay {
+  display: none;
+  position: fixed;
+  inset: 0;
+  background-color: rgba(15, 15, 25, 0.94);
+  z-index: 1000;
+  align-items: center;
+  justify-content: center;
+  animation: security-reset-fade-in 0.35s ease-out;
+}
+
+.security-reset-overlay.visible {
+  display: flex;
+}
+
+@keyframes security-reset-fade-in {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+
+.security-reset-overlay-icon {
+  font-size: 3rem;
+  margin-bottom: 16px;
+}
+
 /* ── First-login security banner ─────────────────────────────────── */
 
 .security-first-login-banner {
diff --git a/app/sovran_systemsos_web/static/js/security.js b/app/sovran_systemsos_web/static/js/security.js
index 3f357ad..13cac7c 100644
--- a/app/sovran_systemsos_web/static/js/security.js
+++ b/app/sovran_systemsos_web/static/js/security.js
@@ -119,12 +119,22 @@ function openSecurityModal() {
         if (!eraseInput || eraseInput.value.trim() !== "ERASE") return;
         resetConfirmBtn.disabled = true;
         resetConfirmBtn.textContent = "Erasing\u2026";
+
+        // Show the full-screen blocking overlay immediately so the user knows
+        // the wipe is in progress even while the API call runs synchronously.
+        var $secResetOverlay = document.getElementById("security-reset-overlay");
+        var $secResetStep = document.getElementById("security-reset-overlay-step");
+        if ($secResetOverlay) $secResetOverlay.classList.add("visible");
+
         if (resetStatus) { resetStatus.textContent = "Running security reset\u2026"; resetStatus.className = "security-status-msg security-status-info"; }
         try {
           await apiFetch("/api/security/reset", { method: "POST" });
+          if ($secResetStep) $secResetStep.textContent = "Reset complete. Rebooting now\u2026";
           if (resetStatus) { resetStatus.textContent = "\u2713 Reset complete. Rebooting\u2026"; resetStatus.className = "security-status-msg security-status-ok"; }
-          if ($rebootOverlay) $rebootOverlay.classList.add("open");
+          if ($rebootOverlay) $rebootOverlay.classList.add("visible");
+          setTimeout(waitForServerReboot, REBOOT_CHECK_INTERVAL);
         } catch (err) {
+          if ($secResetOverlay) $secResetOverlay.classList.remove("visible");
           if (resetStatus) { resetStatus.textContent = "\u2717 Error: " + (err.message || "Reset failed."); resetStatus.className = "security-status-msg security-status-error"; }
           resetConfirmBtn.disabled = false;
           resetConfirmBtn.textContent = "Erase & Reset";
diff --git a/app/sovran_systemsos_web/templates/index.html b/app/sovran_systemsos_web/templates/index.html
index fb51b38..907e2cc 100644
--- a/app/sovran_systemsos_web/templates/index.html
+++ b/app/sovran_systemsos_web/templates/index.html
@@ -210,6 +210,25 @@
     </div>
   </div>
 
+  <!-- Security Reset overlay -->
+  <div class="security-reset-overlay" id="security-reset-overlay">
+    <div class="reboot-card">
+      <div class="security-reset-overlay-icon">🛡</div>
+      <h2 class="reboot-title">Security Reset In Progress</h2>
+      <p class="reboot-message">
+        ⚠️ Wiping all data and credentials.<br />
+        <strong>Do not power off your computer.</strong><br />
+        This may take several minutes. The system will reboot automatically when complete.
+      </p>
+      <div class="reboot-dots">
+        <span class="reboot-dot"></span>
+        <span class="reboot-dot"></span>
+        <span class="reboot-dot"></span>
+      </div>
+      <p class="reboot-submessage" id="security-reset-overlay-step">Erasing data and resetting credentials…</p>
+    </div>
+  </div>
+
   <!-- Reboot overlay -->
   <div class="reboot-overlay" id="reboot-overlay">
     <div class="reboot-card">