{"id":18511,"date":"2026-09-15T03:02:00","date_gmt":"2026-09-14T18:02:00","guid":{"rendered":"https:\/\/m365jp.net\/?p=18511"},"modified":"2026-09-15T03:10:41","modified_gmt":"2026-09-14T18:10:41","slug":"mc1471876-take-action-out-of-band-update-released-to-address-issues-from-the-september-2026-windows-security-update","status":"publish","type":"post","link":"https:\/\/m365jp.net\/index.php\/2026-09-15-mc1471876-take-action-out-of-band-update-released-to-address-issues-from-the-september-2026-windows-security-update","title":{"rendered":"MC1471876 | Take Action: Out-of-band update released to address issues from the September 2026 Windows security update"},"content":{"rendered":"
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MC1471876 | Take Action: Out-of-band update released to address issues from the September 2026 Windows security update <\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n
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Classification<\/th>\nstayInformed<\/td>\n<\/tr>\n
Last Updated<\/th>\n09\/14\/2026 17:37:37<\/td>\n<\/tr>\n
Start Time<\/th>\n09\/14\/2026 17:37:36<\/td>\n<\/tr>\n
End Time<\/th>\n09\/14\/2027 17:37:36<\/td>\n<\/tr>\n
Message Content<\/th>\n\n
Microsoft has identified issues that affect some devices after installing the September 2026 Windows security update<\/a>, released September 8, 2026. On affected devices, host folder shares might be unavailable in Hyper-V-based Linux virtual machines<\/a>, Remote Desktop Services might stop responding<\/a>, which can prevent new sessions from being created and can prevent local and remote sign-in, and some USB Audio Class 1.0 devices might fail in multichannel audio modes<\/a>. <\/div>\n
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An out-of-band (OOB) update was released today, September 14, 2026, to address these issues. For most versions of Windows, these are cumulative updates that include all improvements from the September 2026 Windows security update released September 8, 2026, so you do not need to install any previous update first, except as noted below for hotpatch updates. <\/div>\n
 <\/div>\n
For Windows 11, versions 26H1, 25H2, and 24H2, this OOB update is a security update. It downloads and installs automatically from Windows Update and from Windows Update for Business in accordance with configured policies. It is also available from the Microsoft Update Catalog<\/a> and syncs automatically with Windows Server Update Services (WSUS). <\/div>\n
 <\/div>\n
A corresponding hotpatch update is available from Windows Update for Windows 11, versions 25H2 and 24H2 for devices enrolled in hotpatch updates<\/a>. Devices must have the September 2026 security update installed to receive this hotpatch update automatically. <\/div>\n
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For Windows 11, version 23H2, and Windows 10, version 22H2 (ESU), this update is an optional non-security update. To install it, go to Settings <\/b>> Windows Update<\/b>, select Check for updates<\/b><\/a>, and then select Download and install<\/b>. It is also available from the Microsoft Update Catalog<\/a>.  <\/div>\n
Machine Translation<\/th>\n\n
Microsoft\u306f\u3001 2026\u5e749\u67088\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f2026\u5e749\u6708\u306eWindows\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8<\/a>\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u305f\u5f8c\u3001\u4e00\u90e8\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u3092\u7279\u5b9a\u3057\u307e\u3057\u305f\u3002\u5f71\u97ff\u3092\u53d7\u3051\u305f\u30c7\u30d0\u30a4\u30b9\u3067\u306f\u3001 Hyper-V\u30d9\u30fc\u30b9\u306eLinux\u4eee\u60f3\u30de\u30b7\u30f3\u3067\u30db\u30b9\u30c8\u30d5\u30a9\u30eb\u30c0\u5171\u6709\u304c\u5229\u7528\u3067\u304d\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a<\/a>\u3001 \u30ea\u30e2\u30fc\u30c8\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u30b5\u30fc\u30d3\u30b9\u304c\u5fdc\u7b54\u3057\u306a\u304f\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a<\/a>\u3001\u3053\u308c\u306b\u3088\u308a\u65b0\u3057\u3044\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u4f5c\u6210\u304c\u59a8\u3052\u3089\u308c\u3001\u30ed\u30fc\u30ab\u30eb\u304a\u3088\u3073\u30ea\u30e2\u30fc\u30c8\u30b5\u30a4\u30f3\u30a4\u30f3\u304c\u56f0\u96e3\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u4e00\u90e8\u306e USB Audio Class 1.0\u30c7\u30d0\u30a4\u30b9\u306f\u30de\u30eb\u30c1\u30c1\u30e3\u30f3\u30cd\u30eb\u30aa\u30fc\u30c7\u30a3\u30aa\u30e2\u30fc\u30c9\u3067\u5931\u6557<\/a>\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 <\/div>\n
 <\/div>\n
\u3053\u308c\u3089\u306e\u554f\u984c\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u30012026\u5e749\u670814\u65e5\u306b\u30a2\u30a6\u30c8\u30aa\u30d6\u30d0\u30f3\u30c9(OOB)\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u3057\u305f\u3002\u307b\u3068\u3093\u3069\u306eWindows\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306f2026\u5e749\u67088\u65e5\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f2026\u5e749\u6708\u306eWindows\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304b\u3089\u306e\u3059\u3079\u3066\u306e\u6539\u5584\u3092\u542b\u3080\u7d2f\u7a4d\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306a\u306e\u3067\u3001\u30db\u30c3\u30c8\u30d1\u30c3\u30c1\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306e\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u8a18\u8f09\u3092\u9664\u304d\u3001\u5148\u306b\u4ee5\u524d\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002 <\/div>\n
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Windows 11(\u30d0\u30fc\u30b8\u30e7\u30f326H1\u300125H2\u300124H2)\u3067\u306f\u3001\u3053\u306eOOB\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3059\u3002Windows Update\u304a\u3088\u3073Windows Update for Business\u304b\u3089\u8a2d\u5b9a\u3055\u308c\u305f\u30dd\u30ea\u30b7\u30fc\u306b\u5f93\u3063\u3066\u81ea\u52d5\u7684\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30fb\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u307e\u3059\u3002 \u307e\u305f\u3001Microsoft Update Catalog<\/a> \u304b\u3089\u3082\u5229\u7528\u53ef\u80fd\u3067\u3001Windows Server Update Services(WSUS)\u3068\u81ea\u52d5\u540c\u671f\u3055\u308c\u307e\u3059\u3002 <\/div>\n
 <\/div>\n
\u5bfe\u5fdc\u3059\u308b\u30db\u30c3\u30c8\u30d1\u30c3\u30c1\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306f\u3001Windows Update for Windows 11(\u30d0\u30fc\u30b8\u30e7\u30f325H2\u304a\u3088\u307324H2)\u304b\u3089\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002\u30db\u30c3\u30c8 \u30d1\u30c3\u30c1\u66f4\u65b0\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u30c7\u30d0\u30a4\u30b9<\/a>\u5411\u3051\u306b\u3002\u3053\u306e\u30db\u30c3\u30c8\u30d1\u30c3\u30c1\u3092\u81ea\u52d5\u7684\u306b\u53d7\u3051\u53d6\u308b\u306b\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u304c2026\u5e749\u6708\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/div>\n
 <\/div>\n
Windows 11\u3001\u30d0\u30fc\u30b8\u30e7\u30f323H2\u304a\u3088\u3073Windows 10\u3001\u30d0\u30fc\u30b8\u30e7\u30f322H2(ESU)\u3067\u306f\u3001\u3053\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306f\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u975e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3059\u3002\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u306b\u306f\u3001Windows Update<\/b>>\u8a2d\u5b9a<\/b>\u306b\u884c\u304d\u3001\u300c\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u306e\u78ba\u8a8d<\/b><\/a>\u300d\u3092\u9078\u629e\u3057\u3001\u300c\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u304a\u3088\u3073\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/b>\u300d\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001Microsoft Update Catalog<\/a>\u3067\u3082\u5229\u7528\u53ef\u80fd\u3067\u3059\u3002  <\/div>\n
 <\/div>\n
\u5b8c\u5168\u306a\u30ac\u30a4\u30c0\u30f3\u30b9\u3068\u8a2d\u7f6e\u624b\u9806\u306b\u3064\u3044\u3066\u306f\u3001\u95a2\u9023\u3059\u308bKB\u8a18\u4e8b\u3092\u3054\u89a7\u304f\u3060\u3055\u3044: <\/div>\n