{"id":133079,"date":"2026-02-17T11:04:31","date_gmt":"2026-02-17T02:04:31","guid":{"rendered":"https:\/\/softantenna.com\/blog\/?p=133079"},"modified":"2026-02-17T11:04:31","modified_gmt":"2026-02-17T02:04:31","slug":"windows11-kb5077181-boot-bug-fixed","status":"publish","type":"post","link":"https:\/\/softantenna.com\/blog\/windows11-kb5077181-boot-bug-fixed\/","title":{"rendered":"Windows 11 KB5077181\u3067\u8d77\u52d5\u4e0d\u80fd\u30d0\u30b0\u304c\u3064\u3044\u306b\u4fee\u6b63\u3002\u539f\u56e0\u306f2025\u5e7412\u6708\u66f4\u65b0\u306e\u5931\u6557\u306b\u3042\u3063\u305f"},"content":{"rendered":"

\"\"<\/p>\n

Microsoft\u306f\u30012026\u5e742\u6708\u306e\u6708\u4f8b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(Patch Tuesday)\u3067\u3001Windows 11\u306e\u4e00\u90e8\u5546\u7528\u30c7\u30d0\u30a4\u30b9\u304c\u8d77\u52d5\u4e0d\u80fd\u306b\u306a\u308b\u4e0d\u5177\u5408\u3092\u6b63\u5f0f\u306b\u4fee\u6b63\u3057\u3066\u3044\u307e\u3059(BleepingComputer<\/a>)\u3002<\/p>\n

\u3053\u306e\u554f\u984c\u306f\u300cUNMOUNTABLE_BOOT_VOLUME\u300d<\/strong>\u30a8\u30e9\u30fc\u306b\u3088\u308b\u30d6\u30e9\u30c3\u30af\u30b9\u30af\u30ea\u30fc\u30f3\u304c\u767a\u751f\u3057\u3001\u518d\u8d77\u52d5\u3092\u4fc3\u3059\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u308b\u3082\u306e\u306e\u3001OS\u304c\u7acb\u3061\u4e0a\u304c\u3089\u306a\u304f\u306a\u308b\u3068\u3044\u3046\u6df1\u523b\u306a\u5185\u5bb9\u3067\u3057\u305f\u3002<\/p>\n

\u4f55\u304c\u8d77\u304d\u3066\u3044\u305f\u3044\u306e\u304b\uff1f<\/h2>\n

\u3053\u306e\u4e0d\u5177\u5408\u306f\u3001Windows 11 24H2\/25H2\u3092\u642d\u8f09\u3057\u305f\u4e00\u90e8\u306e\u5546\u7528\u30c7\u30d0\u30a4\u30b9\u3067\u767a\u751f\u3057\u3001\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u9069\u7528\u5f8c\u306b\u9ed2\u3044\u753b\u9762\u304c\u8868\u793a\u3055\u308c\u3001\u8d77\u52d5\u4e0d\u80fd\u306b\u306a\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002\u753b\u9762\u306b\u306f\u300cYour device ran into a problem and needs a restart\u300d\u3068\u3044\u3046\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n

\u5f71\u97ff\u7bc4\u56f2\u306f\u4e00\u90e8\u306e\u5546\u7528\u7269\u7406\u30c7\u30d0\u30a4\u30b9\u306e\u307f\u3067\u3001\u4e00\u822c\u5bb6\u5ead\u5411\u3051PC\u3084\u4eee\u60f3\u30de\u30b7\u30f3\u306f\u5f71\u97ff\u306a\u3057\u3068\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n

\u539f\u56e0\u306f\u300c2025 \u5e74 12 \u6708\u306e\u66f4\u65b0\u5931\u6557\u300d<\/h2>\n

Microsoft\u306e\u8abf\u67fb\u306b\u3088\u308b\u3068\u3001\u6839\u672c\u539f\u56e0\u306f2025\u5e7412\u6708\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u5931\u6557\u3060\u3063\u305f\u3068\u306e\u3053\u3068\u3002\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u5f8c\u306bOS\u304c\u300c\u4e0d\u5b8c\u5168\u306a\u72b6\u614b\u300d\u306e\u307e\u307e\u6b8b\u308a\u3001\u305d\u306e\u5f8c\u306e\u66f4\u65b0(2026\u5e741\u6708\u306eKB5074109\u306a\u3069)\u3092\u9069\u7528\u3059\u308b\u3068\u8d77\u52d5\u4e0d\u80fd\u306b\u9665\u308b\u30b1\u30fc\u30b9\u304c\u3042\u3063\u305f\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u4e0d\u5177\u5408\u306b\u5bfe\u3057\u3001Microsoft\u306f1\u6708\u672b\u306e\u30d7\u30ec\u30d3\u30e5\u30fc\u66f4\u65b0(KB5074105)\u3067\u3001\u300c\u3053\u308c\u4ee5\u4e0a\u58ca\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u300d\u4e88\u9632\u7b56\u3092\u63d0\u4f9b\u3057\u30012\u670810\u65e5\u914d\u4fe1\u306eKB5077181\u3067\u5b8c\u5168\u306b\u4fee\u6b63\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u305f\u3060\u3057\u3001\u3059\u3067\u306b\u8d77\u52d5\u4e0d\u80fd\u306b\u306a\u3063\u305f\u30c7\u30d0\u30a4\u30b9\u306f\u624b\u52d5\u5fa9\u65e7\u304c\u5fc5\u8981\u3067\u3001Microsoft \u306f\u3001\u3059\u3067\u306b\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3057\u307e\u3063\u305f\u4f01\u696d\u5411\u3051\u30c7\u30d0\u30a4\u30b9\u306b\u3064\u3044\u3066\u306f Microsoft Support for Business \u3078\u306e\u554f\u3044\u5408\u308f\u305b\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u306a\u304a\u3001\u4eca\u56de\u306e\u60c5\u5831\u306fAskWoody<\/a>\u306eSusan Bradley\u6c0f\u304c\u5165\u624b\u3057\u305f\u300c\u4f01\u696d\u5411\u3051\u975e\u516c\u958b\u30a2\u30c9\u30d0\u30a4\u30b6\u30ea\u300d\u306b\u57fa\u3065\u304f\u3082\u306e\u3067\u3001Microsoft\u304c\u4e00\u822c\u5411\u3051\u306b\u60c5\u5831\u516c\u958b\u3057\u306a\u304b\u3063\u305f\u7406\u7531\u306f\u660e\u3089\u304b\u306b\u306a\u3063\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n

\nMicrosoft says it has resolved a Windows 11 bug that caused some commercial systems to fail to boot with an \"UNMOUNTABLE_BOOT_VOLUME\" error after installing recent security updates, with the fix delivered in the February 2026 Patch Tuesday update.<\/p>\n

Microsoft\u306f\u3001\u6700\u8fd1\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u305f\u5f8c\u306b\u4e00\u90e8\u306e\u5546\u7528\u30b7\u30b9\u30c6\u30e0\u304c\u300cUNMOUNTABLE_BOOT_VOLUME\u300d\u30a8\u30e9\u30fc\u3067\u8d77\u52d5\u3067\u304d\u306a\u304f\u306a\u308b\u4e0d\u5177\u5408\u306b\u3064\u3044\u3066\u3001\u554f\u984c\u3092\u89e3\u6c7a\u3057\u305f\u3068\u767a\u8868\u3057\u307e\u3057\u305f\u3002\u4fee\u6b63\u306f2026\u5e742\u6708\u306ePatch Tuesday(KB5077181)\u3067\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

The boot issue, which Microsoft previously investigated and linked to failed December 2025 updates, affected a limited number of commercial Windows 11 devices running versions 25H2 and 24H2.<\/p>\n

\u3053\u306e\u8d77\u52d5\u554f\u984c\u306f\u3001Microsoft\u304c\u4ee5\u524d\u306e\u8abf\u67fb\u30672025\u5e7412\u6708\u306e\u66f4\u65b0\u5931\u6557\u306b\u95a2\u9023\u3057\u3066\u3044\u308b\u3068\u7279\u5b9a\u3057\u3066\u3044\u305f\u3082\u306e\u3067\u3001Windows 11 25H2\u304a\u3088\u307324H2\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u4e00\u90e8\u306e\u5546\u7528\u30c7\u30d0\u30a4\u30b9\u306b\u9650\u5b9a\u3057\u3066\u767a\u751f\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n

According to a private enterprise advisory seen by Susan Bradley of Ask Woody, the issue has now been marked as fully resolved in the Windows 11 KB5077181 security update released on February 10, 2026.<\/p>\n

Ask Woody\u306eSusan Bradley\u6c0f\u304c\u78ba\u8a8d\u3057\u305f\u4f01\u696d\u5411\u3051\u975e\u516c\u958b\u30a2\u30c9\u30d0\u30a4\u30b6\u30ea\u306b\u3088\u308b\u3068\u3001\u3053\u306e\u554f\u984c\u306f2026\u5e742\u670810\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305fWindows 11 KB5077181\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3067\u5b8c\u5168\u306b\u89e3\u6c7a\u3055\u308c\u305f\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

In an advisory notice seen by Ask Woody, Microsoft says that \u201cThis issue is fully resolved in the Windows security update released on February 10, 2026 (the Resolved KBs listed above), and later updates\u201d.<\/p>\n

Microsoft\u306f\u30a2\u30c9\u30d0\u30a4\u30b6\u30ea\u306e\u4e2d\u3067\u6b21\u306e\u3088\u3046\u306b\u8ff0\u3079\u3066\u3044\u307e\u3059\u3002\u300c\u3053\u306e\u554f\u984c\u306f2026\u5e742\u670810\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305fWindows\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0(\u4e0a\u8a18\u306e\u89e3\u6c7a\u6e08\u307fKB)\u304a\u3088\u3073\u305d\u308c\u4ee5\u964d\u306e\u66f4\u65b0\u3067\u5b8c\u5168\u306b\u89e3\u6c7a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u300d\n<\/p><\/blockquote>\n

\u300c\u3053\u306e\u554f\u984c\u306f2026\u5e742\u670810\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305fWindows\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0(\u4e0a\u8a18\u306e\u89e3\u6c7a\u6e08\u307fKB)\u304a\u3088\u3073\u305d\u308c\u4ee5\u964d\u306e\u66f4\u65b0\u3067\u5b8c\u5168\u306b\u89e3\u6c7a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u300d<\/strong>\u3068\u306e\u3053\u3068\u30022\u6708\u306e\u6708\u4f8b\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0KB5077181\u3067\u306f\u4ed6\u306b\u3082\u591a\u6570\u306e\u4e0d\u5177\u5408\u304c\u4fee\u6b63<\/a>\u3055\u308c\u3066\u304a\u308a\u3001\u3059\u307f\u3084\u304b\u306b\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n

[via BleepingComputer<\/a>]<\/p>\n","protected":false},"excerpt":{"rendered":"

Microsoft\u306f\u30012026\u5e742\u6708\u306e\u6708\u4f8b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8(Patch Tuesday)\u3067\u3001Windows 11\u306e\u4e00\u90e8\u5546\u7528\u30c7\u30d0\u30a4\u30b9\u304c\u8d77\u52d5\u4e0d\u80fd\u306b\u306a\u308b\u4e0d\u5177\u5408\u3092\u6b63\u5f0f\u306b\u4fee\u6b63\u3057\u3066\u3044\u307e\u3059(BleepingComputer)\u3002 \u3053\u306e\u554f\u984c\u306f […]<\/p>\n","protected":false},"author":2,"featured_media":132629,"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-133079","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\/133079","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=133079"}],"version-history":[{"count":0,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/133079\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media\/132629"}],"wp:attachment":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media?parent=133079"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/categories?post=133079"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/tags?post=133079"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}