{"id":11277,"date":"2026-04-21T14:00:52","date_gmt":"2026-04-21T14:00:52","guid":{"rendered":"https:\/\/cheapwindowsvps.com\/blog\/microsoft-responds-with-emergency-fixes-following-windows-server-outages\/"},"modified":"2026-04-21T14:00:52","modified_gmt":"2026-04-21T14:00:52","slug":"microsoft-responds-with-emergency-fixes-following-windows-server-outages","status":"publish","type":"post","link":"https:\/\/cheapwindowsvps.com\/blog\/microsoft-responds-with-emergency-fixes-following-windows-server-outages\/","title":{"rendered":"Microsoft Responds with Emergency Fixes Following Windows Server Outages"},"content":{"rendered":"<p>Microsoft has released emergency software updates to address issues affecting some Windows Server systems following its latest monthly security patches. These problems arose after the April Patch Tuesday rollout, which is part of Microsoft&#8217;s routine updates aimed at fixing security vulnerabilities.<\/p>\n<p>Reports from system administrators indicated that certain servers were unable to install the update correctly, leading to continuous restart loops. The underlying issue was connected to crashes in the Local Security Authority Subsystem Service (LSASS), which is crucial for managing authentication and security policies. Servers configured as domain controllers, which are vital for handling network logins within organizations, were particularly impacted.<\/p>\n<p>Microsoft acknowledged that a limited number of devices running Windows Server 2025 experienced installation errors, typically indicated by the error code 800F0983. The company monitored diagnostic reports before deploying out-of-band (OOB) fixes. They also noted that issues might arise during the setup of new domain controllers, especially if authentication requests were processed too early in the system&#8217;s startup process.<\/p>\n<h3>Emergency Patches Released<\/h3>\n<p>Microsoft has rolled out emergency updates for the affected versions of Windows Server:<\/p>\n<ul>\n<li>Windows Server 2025: KB5091157 (OS Build 26100.32698) Out-of-band<\/li>\n<li>Windows Server, version 23H2: KB5091571 (OS Build 25398.2276) Out-of-band<\/li>\n<li>Windows Server 2022: KB5091575 (OS Build 20348.5024) Out-of-band<\/li>\n<li>Windows Server 2019: KB5091573 (OS Build 17763.8647) Out-of-band<\/li>\n<li>Windows Server 2016: KB5091572 (OS Build 14393.9062) Out-of-band<\/li>\n<li>Windows Server 2025 Datacenter: Azure Edition: Hotpatch KB5091470 (OS Build 26100.32704) Out-of-band<\/li>\n<li>Windows Server 2022 Datacenter: Azure Edition: Hotpatch KB5091576 (OS Build 20348.5029) Out-of-band<\/li>\n<\/ul>\n<p>The update for Windows Server 2025 aims to resolve both the installation failure and the restart loop problem, while the patches for earlier versions focus on preventing the reboot issues. Some devices running Windows Server 2025 may enter BitLocker recovery mode after installing the April update, requiring users to provide encryption keys. However, this situation is mostly limited to enterprise-managed systems.<\/p>\n<h3>Update Concerns<\/h3>\n<p>This incident adds to a series of disruptions linked to Microsoft&#8217;s monthly updates. Previous months have seen the company issue emergency patches for various issues, including authentication failures in Windows 11 and Bluetooth connectivity problems.<\/p>\n<p>Earlier this year, January&#8217;s Patch Tuesday resulted in widespread complaints related to broken remote desktop access and application crashes, raising questions about update reliability. Microsoft addressed a significant glitch in March that disrupted authentication across several applications, including Teams Free, OneDrive, and Copilot, connected to the March 10 update for Windows 11.<\/p>\n<p>In a recent communication to users, Windows chief Pavan Davuluri recognized these concerns and promised improvements to the update process, stating, &quot;Thank you for holding us to a high standard. Windows is as much yours as it is ours. We&#8217;re committed to strengthening its foundation and delivering innovation where it matters, for you.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft has released emergency software updates to address issues affecting some Windows Server systems following its latest monthly security patches. These problems arose after the April Patch Tuesday rollout, which is part of Microsoft&#8217;s routine updates aimed at fixing security vulnerabilities. Reports from system administrators indicated that certain servers were unable to install the update [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":11278,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-11277","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/posts\/11277","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/comments?post=11277"}],"version-history":[{"count":0,"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/posts\/11277\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/media\/11278"}],"wp:attachment":[{"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/media?parent=11277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/categories?post=11277"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cheapwindowsvps.com\/blog\/wp-json\/wp\/v2\/tags?post=11277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}