Suggest upgrading to SP3 or later for invalid certificate errors.

chrome/browser/ssl/ssl_blocking_page.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ssl/ssl_blocking_page.h"
 
 #include "base/build_time.h"
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "base/i18n/time_formatting.h"
@@ skipping 595 matching lines @@
     load_time_data.SetString(
         "explanationParagraph", error_info.details());
     load_time_data.SetString(
         "primaryButtonText",
         l10n_util::GetStringUTF16(IDS_SSL_OVERRIDABLE_SAFETY_BUTTON));
     load_time_data.SetString(
         "finalParagraph",
         l10n_util::GetStringFUTF16(IDS_SSL_OVERRIDABLE_PROCEED_PARAGRAPH, url));
   } else {  // Non-overridable.
     load_time_data.SetBoolean("overridable", false);
-    load_time_data.SetString(
-        "explanationParagraph",
-        l10n_util::GetStringFUTF16(IDS_SSL_NONOVERRIDABLE_MORE, url));
+    SSLErrorInfo::ErrorType type =
+        SSLErrorInfo::NetErrorToErrorType(cert_error_);
+    if (type == SSLErrorInfo::CERT_INVALID && SSLErrorClassification::
+        IsWindowsVersionSP3OrLower()) {
+      load_time_data.SetString(
+          "explanationParagraph",
+          l10n_util::GetStringFUTF16(
+              IDS_SSL_NONOVERRIDABLE_MORE_INVALID_SP3, url));
+    } else {
+      load_time_data.SetString("explanationParagraph",
+                               l10n_util::GetStringFUTF16(
+                                   IDS_SSL_NONOVERRIDABLE_MORE, url));
+    }
     load_time_data.SetString(
         "primaryButtonText",
         l10n_util::GetStringUTF16(IDS_SSL_NONOVERRIDABLE_RELOAD_BUTTON));
     // Customize the help link depending on the specific error type.
     // Only mark as HSTS if none of the more specific error types apply, and use
     // INVALID as a fallback if no other string is appropriate.
-    SSLErrorInfo::ErrorType type =
-        SSLErrorInfo::NetErrorToErrorType(cert_error_);
     load_time_data.SetInteger("errorType", type);
     int help_string = IDS_SSL_NONOVERRIDABLE_INVALID;
     switch (type) {
       case SSLErrorInfo::CERT_REVOKED:
         help_string = IDS_SSL_NONOVERRIDABLE_REVOKED;
         break;
       case SSLErrorInfo::CERT_PINNED_KEY_MISSING:
         help_string = IDS_SSL_NONOVERRIDABLE_PINNED;
         break;
       case SSLErrorInfo::CERT_INVALID:
@@ skipping 166 matching lines @@
     // sure we don't clear the captive portal flag, since the interstitial was
     // potentially caused by the captive portal.
     captive_portal_detected_ = captive_portal_detected_ ||
         (results->result == captive_portal::RESULT_BEHIND_CAPTIVE_PORTAL);
     // Also keep track of non-HTTP portals and error cases.
     captive_portal_no_response_ = captive_portal_no_response_ ||
         (results->result == captive_portal::RESULT_NO_RESPONSE);
   }
 #endif
 }