{"id":184769,"date":"2026-01-25T10:57:43","date_gmt":"2026-01-25T15:57:43","guid":{"rendered":"https:\/\/pureinfotech.com\/?p=184769"},"modified":"2026-01-26T07:34:29","modified_gmt":"2026-01-26T12:34:29","slug":"kb5078129-fixes-issues-windows-10","status":"publish","type":"post","link":"https:\/\/pureinfotech.com\/kb5078129-fixes-issues-windows-10\/","title":{"rendered":"KB5078129 emergency update fixes January 2026 bugs on Windows 10 ESU"},"content":{"rendered":"<ul class=\"sum\">\n<li>Microsoft released an Out-of-band update (KB5078129) to patch bugs introduced by the January 2026 Patch Tuesday update.<\/li>\n<li>This update addresses apps dependent on cloud storage services on Windows 10.<\/li>\n<\/ul>\n<p><span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\">Microsoft is now rolling out the\u00a0<a href=\"https:\/\/support.microsoft.com\/en-us\/topic\/january-24-2026-kb5078129-os-builds-19045-6812-and-19044-6812-out-of-band-cfbdbb30-81eb-49ff-ada2-c2af09aa7c1e\" target=\"_blank\" rel=\"noopener\">Out-of-band (OOB)<\/a>\u00a0update KB5078129, available as builds 26200.6812 and 26100.6812 for Windows 10 22H1 and 21H2, to address a bug that prevents apps that use cloud storage (such as OneDrive and Dropbox) from working correctly, introduced with the\u00a0<a href=\"https:\/\/pureinfotech.com\/kb5073724-windows-10-esu-january-2026-update\/\" target=\"_blank\" rel=\"noopener\">January 2026 update<\/a>.<\/span><\/p>\n<p>On January 13, 2026, the software giant began rolling out the first Patch Tuesday Update of 2026 for <a href=\"https:\/\/pureinfotech.com\/tag\/windows-10\">Windows 10<\/a> and <a href=\"https:\/\/pureinfotech.com\/tag\/windows-11\">Windows 11<\/a>, with new protections and improvements. However, this update also shipped with a known issue that made some apps unresponsive or caused\u00a0unexpected errors when opening or saving files stored in cloud\u2011based locations.<\/p>\n<p>In the Outlook app, for example, configurations that store PST files on OneDrive may hang and fail to reopen unless the process is terminated or the computer is restarted.<\/p>\n<p>The update KB5078129 (builds 19045.6812 and 19044.6812) resolves this issue for affected devices that are enrolled in the <a href=\"https:\/\/pureinfotech.com\/enroll-extended-security-updates-esu-windows-10\/\">Extended Security Updates (ESU)<\/a> program, as support for Windows 10 has already ended on November 14, 2025.<\/p>\n<h2>Windows 10 22H2 update KB5078129<\/h2>\n<ul>\n<li><strong>Release date:<\/strong> January 24, 2027.<\/li>\n<li><strong>Builds:<\/strong> 19045.6812 (22H2), 19044.6812 (21H2).<\/li>\n<li><strong>Purpose:<\/strong> Fixes unresponsive or unexpected errors with some apps using cloud storage services introduced with the January 2026, Patch Tuesday update.<\/li>\n<li><strong>Affected versions:<\/strong> Windows 10 22H2 and 21H2.<\/li>\n<\/ul>\n<p>If you have a computer\u00a0<span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\">affected by these bugs, you should install this update immediately by going to <strong>Settings<\/strong>\u00a0&gt;\u00a0<strong>Windows Update<\/strong><\/span>\u00a0and clicking the <strong>&#8220;Check for updates&#8221;<\/strong> button.<\/p>\n<section class=\"custom-related-posts-wrapper\"><span class=\"custom-related-posts-heading\">Related<\/span><div class=\"custom-related-posts-container\"><a href=\"https:\/\/pureinfotech.com\/kb5078127-fixes-issues-windows-11\/\" class=\"custom-related-post-item\" data-umami-event=\"related_inpost_clicked\" data-umami-event-name=\"KB5078127 emergency update fixes chaos caused by January 2026 Windows 11 release\"><div class=\"custom-related-post-thumbnail\"><img src=\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2025\/06\/out-of-band-update-windows-11-hero.webp?fit=300%2C188&#038;quality=78&#038;strip=all&#038;ssl=1\" alt=\"KB5078127 emergency update fixes chaos caused by January 2026 Windows 11 release\" decoding=\"async\" loading=\"lazy\" \/><\/div><span class=\"custom-related-post-title\">KB5078127 emergency update fixes chaos caused by January 2026 Windows 11 release<\/span><\/a><\/div><\/section>\n<p>Alternatively, you can download and install the update KB5078129 from the <strong><a href=\"https:\/\/www.catalog.update.microsoft.com\/Search.aspx?q=KB5078129\" target=\"_blank\" rel=\"noopener\">Microsoft Update Catalog<\/a><\/strong> for Windows 11.<\/p>\n<p>This out-of-band update includes all fixes and improvements from the original January 2026 Security update, released January 13, 2026.<\/p>\n    <div class=\"responsive-youtube-container\">\n        <iframe\n            src=\"https:\/\/www.youtube.com\/embed\/vVo576k92Tc?rel=0&showinfo=0\"\n            frameborder=\"0\"\n            allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\"\n            allowfullscreen\n            loading=\"lazy\"\n        ><\/iframe>\n    <\/div>\n<h2>Out-of-band (OOB) updates explained<\/h2>\n<p>Out-of-band updates are emergency patches released outside the regular monthly schedule. Microsoft issues them to address urgent problems (such as newly discovered security flaws or critical bugs) that can&#8217;t wait for the next Patch Tuesday.<\/p>\n<p>These updates are cumulative, meaning they include all previous fixes (security and non-security) plus the new targeted resolution.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft rushes an emergency Windows 10 fix after January 2026 update breaks cloud-based apps.<\/p>\n","protected":false},"author":2,"featured_media":184771,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[10,23],"tags":[2540,2747],"class_list":["post-184769","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-windows","tag-windows-10","tag-windows-update"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>KB5078129 emergency update fixes January 2026 bugs on Windows 10 ESU - Pureinfotech<\/title>\n<meta name=\"description\" content=\"KB5078129 Out-of-band update releases to fix app crashes and Outlook issues on Windows 10 22H2 and 21H2 caused by January updates.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pureinfotech.com\/kb5078129-fixes-issues-windows-10\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Microsoft issues urgent Windows 10 fix after January update breaks apps \u2013 KB5078129 now available\" \/>\n<meta property=\"og:description\" content=\"KB5078129 Out-of-band update releases to fix app crashes and Outlook issues on Windows 10 22H2 and 21H2 caused by January updates.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/pureinfotech.com\/kb5078129-fixes-issues-windows-10\/\" \/>\n<meta property=\"og:site_name\" content=\"Pureinfotech \u2022 Windows 10 &amp; 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With over 21 years as a technology writer and IT Specialist, Mauro specializes in Windows, software, and cross-platform systems such as Linux, Android, and macOS. Certifications he holds include Microsoft Certified Solutions Associate (MCSA), Cisco Certified Network Professional (CCNP), VMware Certified Professional (VCP), and CompTIA A+ and Network+. Mauro is a recognized Microsoft MVP and has also been a long-time contributor to Windows Central. You can follow him on YouTube, Threads, BlueSky, X (Twitter), LinkedIn and About.me. 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