{"id":133359,"date":"2026-03-09T11:13:31","date_gmt":"2026-03-09T02:13:31","guid":{"rendered":"https:\/\/softantenna.com\/blog\/?p=133359"},"modified":"2026-03-09T11:13:31","modified_gmt":"2026-03-09T02:13:31","slug":"windows-secure-boot-certificates-faq","status":"publish","type":"post","link":"https:\/\/softantenna.com\/blog\/windows-secure-boot-certificates-faq\/","title":{"rendered":"Microsoft \u304c\u4e00\u6642\u524a\u9664\u3057\u3066\u3044\u305f\u300cSecure Boot \u66f4\u65b0\u306e\u91cd\u8981\u60c5\u5831\u300d\u304c\u5fa9\u6d3b"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/softantenna.com\/blog\/wp-content\/uploads\/2026\/02\/secureboot.jpg\" alt=\"\" width=\"1280\" height=\"853\" class=\"aligncenter size-full wp-image-132921\" \/><\/p>\n<p>Microsoft\u306f2026\u5e742\u6708\u306e\u6708\u4f8b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(<a href=\"https:\/\/softantenna.com\/blog\/windows-11-version-25h2-24h2-kb5077181-monthly\/\">KB5077181<\/a>\u3001<a href=\"https:\/\/softantenna.com\/blog\/windows-10-esu-windows-10-enterprise-ltsc-2021-kb5075912-monthly\/\">KB5075912<\/a>)\u3067\u30bb\u30ad\u30e5\u30a2\u30d6\u30fc\u30c8\u306e\u65b0\u3057\u3044\u8a3c\u660e\u66f8\u3092\u914d\u5e03\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f<a href=\"https:\/\/softantenna.com\/blog\/windows-secure-boot-update\/\">2026\u5e74\u306b\u65e7\u8a3c\u660e\u66f8\u304c15\u5e74\u306e\u6709\u52b9\u671f\u9650\u3092\u8fce\u3048\u3066\u5931\u52b9\u3059\u308b<\/a>\u305f\u3081\u306e\u5fc5\u9808\u66f4\u65b0\u3067\u3059\u3002<\/p>\n<p>\u4eca\u56de\u3001Microsoft\u304c\u516c\u958b\u3057\u3066\u3044\u305f\u3053\u306e\u4ef6\u306b\u95a2\u3059\u308bFAQ\u304b\u3089\u3001\u66f4\u65b0\u3092\u6020\u3063\u305f\u5834\u5408\u306e\u300c\u91cd\u5927\u306a\u30ea\u30b9\u30af\u300d\u306b\u95a2\u3059\u308b\u8aac\u660e\u304c\u4e00\u6642\u7684\u306b\u524a\u9664\u3055\u308c\u3001\u305d\u306e\u5f8c\u3088\u308a\u8a73\u3057\u3044\u8aac\u660e\u306b\u6539\u5584\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u5224\u660e\u3057\u307e\u3057\u305f(<a href=\"https:\/\/www.neowin.net\/news\/microsoft-had-quietly-deleted-key-info-about-a-windows-1110-update-that-you-must-install\/\">Neowin<\/a>)\u3002<\/p>\n<h2>\u30bb\u30ad\u30e5\u30a2\u30d6\u30fc\u30c8\u8a3c\u660e\u66f8\u3092\u66f4\u65b0\u3057\u306a\u3044\u3068\u4f55\u304c\u8d77\u304d\u308b\u306e\u304b<\/h2>\n<p><a href=\"https:\/\/web.archive.org\/web\/20250919085920\/https:\/\/support.microsoft.com\/en-us\/topic\/frequently-asked-questions-about-the-secure-boot-update-process-b34bf675-b03a-4d34-b689-98ec117c7818\">\u524a\u9664\u524d\u306eFAQ<\/a>\u3067\u306f\u3001\u8a3c\u660e\u66f8\u3092\u66f4\u65b0\u3057\u306a\u3044\u5834\u5408\u306e\u5f71\u97ff\u304c\u660e\u78ba\u306b\u66f8\u304b\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<blockquote><p>\nQ3: What happens if Secure Boot certificates aren\u2019t updated before expiration?<\/p>\n<p>The computer will still start Windows normally, even if the Secure Boot certificates are not updated.<br \/>\nThe computer will eventually stop receiving certain Windows security updates from Microsoft including Boot Manager and Secure Boot component security updates. This will put the device at risk of BootKits that could take full control of the computer.<\/p>\n<p>Q5: What happens to a device that does not have the new certificates after the old certificates expire.<\/p>\n<p>After the certificates expire, the device will continue to boot without change, however the device will stop getting security updates for the boot manager and the Secure Boot components. This will put the entire device at risk of \u201cbootkit\u201d malware that can affect all aspects of security on the device.\n<\/p><\/blockquote>\n<p>\u8a3c\u660e\u66f8\u3092\u66f4\u65b0\u3057\u306a\u3044\u5834\u5408\u3001Windows\u81ea\u4f53\u306f\u8d77\u52d5\u3059\u308b\u3082\u3001 \u30d6\u30fc\u30c8\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3084\u30bb\u30ad\u30e5\u30a2\u30d6\u30fc\u30c8\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u304c\u53d7\u3051\u53d6\u308c\u306a\u304f\u306a\u308a\u3001\u305d\u306e\u7d50\u679c\u3001\u30d6\u30fc\u30c8\u30ad\u30c3\u30c8\u653b\u6483\u306e\u30ea\u30b9\u30af\u304c\u5927\u5e45\u306b\u4e0a\u6607\u3059\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u30d6\u30fc\u30c8\u30ad\u30c3\u30c8\u306f OS \u8d77\u52d5\u524d\u306e\u9818\u57df\u3092\u4e57\u3063\u53d6\u308b\u30bf\u30a4\u30d7\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u3067\u3001\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u3092\u5b8c\u5168\u306b\u652f\u914d\u3067\u304d\u308b\u5371\u967a\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u5fa9\u5143\u3055\u308c\u305f FAQ \u306e\u65b0\u3057\u3044\u8aac\u660e<\/h2>\n<p>\u4e0a\u8a18FAQ\u60c5\u5831\u306f\u4e00\u6642\u671f\u524a\u9664\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001<a href=\"https:\/\/support.microsoft.com\/en-us\/topic\/frequently-asked-questions-about-the-secure-boot-update-process-b34bf675-b03a-4d34-b689-98ec117c7818\">\u5fa9\u6d3b\u3057\u3066<\/a>\u3088\u308a\u308f\u304b\u308a\u3084\u3059\u304f\u6539\u5584\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u73fe\u5728\u306f\u6700\u91cd\u8981\u9805\u76ee\u3068\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8aac\u660e\u304c\u63b2\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<blockquote><p>\nQ1: What happens if my device doesn\u2019t get the new Secure Boot certificates before the old ones expire?<\/p>\n<p>After the Secure Boot certificates expire, devices that haven\u2019t received the newer 2023 certificates will continue to start and operate normally, and standard Windows updates will continue to install. However, these devices will no longer be able to receive new security protections for the early boot process, including updates to Windows Boot Manager, Secure Boot databases, revocation lists, or mitigations for newly discovered boot level vulnerabilities.<\/p>\n<p>Over time, this limits the device\u2019s protection against emerging threats and may affect scenarios that rely on Secure Boot trust, such as BitLocker hardening or third-party bootloaders. Most Windows devices will receive the updated certificates automatically, and many OEMs have provided firmware updates when needed. Keeping your device current with these updates helps ensures it can continue receiving the full set of security protections that Secure Boot is designed to provide.<\/p>\n<\/blockquote>\n<ul>\n<li>\n<p><span>\u8a3c\u660e\u66f8\u304c\u5931\u52b9\u3057\u3066\u3082 Windows \u306f\u8d77\u52d5\u3057\u3001\u901a\u5e38\u306e\u66f4\u65b0\u3082\u5c4a\u304f<\/span><\/p>\n<\/li>\n<li>\n<p><span>\u305f\u3060\u3057 <strong>\u521d\u671f\u30d6\u30fc\u30c8\u30d7\u30ed\u30bb\u30b9\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4fdd\u8b77\u304c\u66f4\u65b0\u3055\u308c\u306a\u304f\u306a\u308b<\/strong><\/span><\/p>\n<\/li>\n<li>\n<p><span>\u30d6\u30fc\u30c8\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3001\u30bb\u30ad\u30e5\u30a2\u30d6\u30fc\u30c8\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3001\u8106\u5f31\u6027\u7de9\u548c\u7b56\u306a\u3069\u304c\u66f4\u65b0\u3055\u308c\u306a\u3044<\/span><\/p>\n<\/li>\n<li>\n<p><span>BitLocker\u306e\u5f37\u5316\u3084\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u88fd\u30d6\u30fc\u30c8\u30ed\u30fc\u30c0\u30fc\u306a\u3069\u3001\u30bb\u30ad\u30e5\u30a2\u30d6\u30fc\u30c8\u3092\u524d\u63d0\u3068\u3059\u308b\u6a5f\u80fd\u306b\u3082\u5f71\u97ff<\/span><\/p>\n<\/li>\n<li>\n<p><span>\u591a\u304f\u306e\u30c7\u30d0\u30a4\u30b9\u306f\u81ea\u52d5\u3067\u65b0\u8a3c\u660e\u66f8\u3092\u53d7\u3051\u53d6\u308b\u304c\u3001OEM \u306b\u3088\u308b\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u66f4\u65b0\u304c\u5fc5\u8981\u306a\u5834\u5408\u3082\u3042\u308b<\/span><\/p>\n<\/li>\n<\/ul>\n<p>\u3064\u307e\u308a\u3001\u66f4\u65b0\u3057\u306a\u304f\u3066\u3082\u52d5\u304f\u3082\u306e\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306f\u78ba\u5b9f\u306b\u5f31\u304f\u306a\u308b\u3068\u3044\u3046\u3053\u3068\u304c\u660e\u78ba\u306b\u793a\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h2>\u30e6\u30fc\u30b6\u30fc\u304c\u4eca\u3059\u3050\u3084\u308b\u3079\u304d\u3053\u3068<\/h2>\n<p>Windows 11\/10\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u30012026\u5e742\u6708\u306e\u6708\u4f8b\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5fc5\u305a\u9069\u7528\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066OEM\u306eBIOS\/UEFI\u66f4\u65b0\u3082\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30bb\u30ad\u30e5\u30a2\u30d6\u30fc\u30c8\u306fWindows\u306e\u57fa\u76e4\u3068\u306a\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u306a\u306e\u3067\u3001\u4eca\u56de\u306e\u66f4\u65b0\u306f\u5fc5\u9808\u3068\u3044\u3048\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft\u306f2026\u5e742\u6708\u306e\u6708\u4f8b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(KB5077181\u3001KB5075912)\u3067\u30bb\u30ad\u30e5\u30a2\u30d6\u30fc\u30c8\u306e\u65b0\u3057\u3044\u8a3c\u660e\u66f8\u3092\u914d\u5e03\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f2026\u5e74\u306b\u65e7\u8a3c\u660e\u66f8\u304c15\u5e74\u306e\u6709\u52b9\u671f\u9650\u3092\u8fce\u3048\u3066\u5931\u52b9\u3059\u308b\u305f\u3081\u306e\u5fc5\u9808\u66f4\u65b0\u3067\u3059\u3002 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":132921,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[3],"tags":[3298,4387],"class_list":["post-133359","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows","tag-windows","tag-windows11"],"_links":{"self":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/133359","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/comments?post=133359"}],"version-history":[{"count":0,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/133359\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media\/132921"}],"wp:attachment":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media?parent=133359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/categories?post=133359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/tags?post=133359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}