{"id":215711,"date":"2026-08-11T19:04:12","date_gmt":"2026-08-11T17:04:12","guid":{"rendered":"https:\/\/www.deskmodder.de\/blog\/?p=215711"},"modified":"2026-08-11T19:24:40","modified_gmt":"2026-08-11T17:24:40","slug":"kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august","status":"publish","type":"post","link":"https:\/\/www.deskmodder.de\/blog\/2026\/08\/11\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\/","title":{"rendered":"KB5121000 Windows 11 26H1 [Manueller Download] Sicherheitspatch August"},"content":{"rendered":"<p>Auch f\u00fcr die Windows 11 26H1 hat Microsoft ein neues Sicherheitsupdate f\u00fcr den Monat August 2026 bereitgestellt. Dabei handelt es sich um die KB 5121000. Durch dieses Update wird die Versionsnummer auf die Windows 11 26H1 28000.2704 ge\u00e4ndert.<\/p>\n<p><a href=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/08\/kb5121000-windows-11-26h1.jpg\" rel=\"lightbox[215711]\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/08\/kb5121000-windows-11-26h1-500x350.jpg\" alt=\"\" width=\"500\" height=\"350\" class=\"aligncenter size-medium wp-image-215712\" srcset=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/08\/kb5121000-windows-11-26h1-500x350.jpg 500w, https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/08\/kb5121000-windows-11-26h1-810x566.jpg 810w, https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/08\/kb5121000-windows-11-26h1-293x205.jpg 293w, https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2026\/08\/kb5121000-windows-11-26h1.jpg 964w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>Bei der 26H1 handelt es sich um eine ganz <a href=\"https:\/\/www.deskmodder.de\/blog\/2026\/02\/11\/windows-11-26h1-bleibt-bis-2027-bei-der-26h1\/\" target=\"_blank\">spezielle Version<\/a>, die nicht das Update auf die kommende <a href=\"https:\/\/www.deskmodder.de\/blog\/2026\/06\/20\/windows-11-26h2-wurde-offiziell-angekuendigt\/\" target=\"_blank\">Windows 11 26H2<\/a> erh\u00e4lt.<\/p>\n<p>In diesem Update integriert sind die \u00c4nderungen vom optionalen Update (<a href=\"https:\/\/www.deskmodder.de\/blog\/2026\/07\/29\/kb5101681-windows-11-26h1-manueller-download-das-optionale-update-juli-2026\/\" target=\"_blank\">KB5101681<\/a>). Hier wurden einige \u00c4nderungen integriert, die auch die anderen Versionen erhalten haben. Aber das k\u00f6nnt ihr euch <a href=\"https:\/\/www.deskmodder.de\/blog\/2026\/07\/29\/kb5101681-windows-11-26h1-manueller-download-das-optionale-update-juli-2026\/\" target=\"_blank\">in Ruhe hier durchlesen<\/a>.<\/p>\n<h3>Bekannte Probleme durch die KB5121000<\/h3>\n<ul>\n<li>Keine beschrieben<\/li>\n<\/ul>\n<h3>Korrekturen und Verbesserungen durch die KB5121000<\/h3>\n<ul>\n<li>Dieses Update behebt Sicherheitsprobleme im Windows-Betriebssystem.<\/li>\n<li>Die einzelnen Sicherheitsl\u00fccken, die geschlossen wurden, k\u00f6nnt ihr <a href=\"https:\/\/msrc.microsoft.com\/update-guide\/\" target=\"_blank\">hier nachlesen<\/a><\/li>\n<li><strong>Ger\u00e4te<\/strong> Dieses Update verbessert die TPM-Wartungsberichte, indem es sicherstellt, dass der Status des EK-Zertifikats korrekt gemeldet wird.<\/li>\n<li><strong>Secure Boot<\/strong> Dieses Update enth\u00e4lt zus\u00e4tzliche, besonders zuverl\u00e4ssige Daten zur Ger\u00e4tezielauswahl, wodurch die Abdeckung der Ger\u00e4te erweitert wird, die f\u00fcr den automatischen Erhalt neuer Secure-Boot-Zertifikate in Frage kommen. Die Bereitstellung der Zertifikate \u00fcber Windows-Updates wird in den kommenden Monaten auf unterst\u00fctzten PCs und nicht verwalteten Unternehmensger\u00e4ten fortgesetzt.<\/li>\n<li><a href=\"https:\/\/support.microsoft.com\/help\/5121000\" target=\"_blank\">support.microsoft<\/a><\/li>\n<\/ul>\n<h3>Manueller Download der KB5121000<\/h3>\n<ul>\n<li><a href=\"https:\/\/catalog.sf.dl.delivery.mp.microsoft.com\/filestreamingservice\/files\/e1841a80-7448-4bd6-9832-8e194a48803e\/public\/windows11.0-kb5121000-x64_8bb67d631779e3e5373f2445bf35fa43a09be1da.msu\" target=\"_blank\">Windows11.0-KB5121000-x64.msu<\/a><\/li>\n<li>ARM: <a href=\"https:\/\/catalog.sf.dl.delivery.mp.microsoft.com\/filestreamingservice\/files\/f9ed9ee7-ce58-4df4-8262-e83f28b9899f\/public\/windows11.0-kb5121000-arm64_882c5ac873361041fde45f568871b39d449e6064.msu\" target=\"_blank\">Windows11.0-KB5121000-arm64.msu<\/a> <\/li>\n<\/ul>\n<h3>Windows 11 Tutorials und Hilfe<\/h3>\n<ul>\n<li>In unserem <a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Kategorie:Windows_11\" rel=\"noopener noreferrer\" target=\"_blank\">Windows 11 Wiki<\/a> findet ihr sehr viele hilfreiche Tipps und Tricks.<\/li>\n<li>Falls ihr Fragen habt, dann stellt diese ganz einfach bei uns im <a href=\"https:\/\/www.deskmodder.de\/phpBB3\/viewforum.php?f=353\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Forum<\/strong><\/a>.<\/li>\n<li><strong>Installationsmedien:<\/strong> Aktuelle Windows 11 ISOs findet ihr hier: <a href=\"https:\/\/www.deskmodder.de\/blog\/2025\/06\/28\/windows-11-25h2-26200-iso-esd-deutsch-english\/\" rel=\"noopener\" target=\"_blank\">25H2 26200<\/a>. Ansonsten <a href=\"https:\/\/www.deskmodder.de\/blog\/#:~:text=l%C3%A4dt%20die%2019045.3803-,Download%2DBereich,-Windows%2011%20ISO\" rel=\"noopener\" target=\"_blank\">immer in der rechten Sidebar<\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_neu_clean_installieren_Tipps_und_Tricks\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 neu clean installieren Tipps und Tricks<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_auch_ohne_TPM_und_Secure_Boot_installieren\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 auch ohne TPM und Secure Boot installieren<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_mit_einem_lokalen_oder_Microsoft_Konto_installieren\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 mit lokalem Konto auch Offline installieren<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Windows_11_Inplace_Upgrade_Reparatur_oder_Feature_Update\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Windows 11 Inplace Upgrade Reparatur oder Feature Update<\/strong><\/a>.<\/li>\n<li><a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Automatisch_anmelden_Pin_entfernen_Windows_11\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Automatisch anmelden Pin entfernen Windows 11<\/strong><\/a>.<\/li>\n<li>Alle Beitr\u00e4ge zu Windows 11 im Blog findet ihr <a href=\"https:\/\/www.deskmodder.de\/blog\/category\/windows-11\/\" rel=\"noopener\" target=\"_blank\">\u00fcber diese Seite<\/a>. Wobei auch <a href=\"https:\/\/www.deskmodder.de\/blog\/\" rel=\"noopener\" target=\"_blank\">alle anderen Artikel<\/a> interessant sein k\u00f6nnen.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Auch f\u00fcr die Windows 11 26H1 hat Microsoft ein neues Sicherheitsupdate f\u00fcr den Monat August 2026 bereitgestellt. Dabei handelt es sich um die KB 5121000. Durch dieses Update wird die Versionsnummer auf die Windows 11 26H1 28000.2704 ge\u00e4ndert. Bei der&hellip; <\/p>\n","protected":false},"author":134,"featured_media":153427,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[80310],"tags":[97724,97700,97699,94434],"class_list":["post-215711","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows-11","tag-28000-2704","tag-kb-5121000","tag-kb5121000","tag-windows-11-26h1"],"wp_featured_image":{"id":153427,"alt_text":"","description":"","media_type":"image","media_details":{"width":978,"height":584,"file":"2021\/05\/windows-10-update-logo.jpg","sizes":{"medium":{"file":"windows-10-update-logo-500x299.jpg","width":500,"height":299,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-500x299.jpg"},"large":{"file":"windows-10-update-logo-810x484.jpg","width":810,"height":484,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-810x484.jpg"},"thumbnail":{"file":"windows-10-update-logo-306x183.jpg","width":306,"height":183,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-306x183.jpg"},"blog-large":{"file":"windows-10-update-logo-642x300.jpg","width":642,"height":300,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-642x300.jpg"},"blog-medium":{"file":"windows-10-update-logo-306x205.jpg","width":306,"height":205,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-306x205.jpg"},"recent-thumb":{"file":"windows-10-update-logo-350x316.jpg","width":350,"height":316,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-350x316.jpg"},"service-featured":{"file":"windows-10-update-logo-600x330.jpg","width":600,"height":330,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-600x330.jpg"},"wp_rp_thumbnail":{"file":"windows-10-update-logo-50x50.jpg","width":50,"height":50,"mime-type":"image\/jpeg","source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo-50x50.jpg"}},"image_meta":{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0","keywords":[]}},"post":155113,"source_url":"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo.jpg"},"commentcount":3,"wp_comments":[{"id":342911,"parent":0,"author":2428,"author_name":"teddy58","author_email":"juppi42@gmx.de","author_url":"","author_avatar_urls":{"24":"https:\/\/secure.gravatar.com\/avatar\/b9ab9f5b52eb6b6a6be82373915b7d7a5ce45d15990948862573f3acae697de9?s=24&d=mm&r=g","48":"https:\/\/secure.gravatar.com\/avatar\/b9ab9f5b52eb6b6a6be82373915b7d7a5ce45d15990948862573f3acae697de9?s=48&d=mm&r=g","96":"https:\/\/secure.gravatar.com\/avatar\/b9ab9f5b52eb6b6a6be82373915b7d7a5ce45d15990948862573f3acae697de9?s=96&d=mm&r=g"},"date":"2026-08-13T13:33:54","cld_nonce":"b1ffb62e77","content":{"rendered":"<p>hallo<br \/>\nWindows update instaliert sich einwanfrei.<br \/>\nNach Neustart erscheint das win logo danach erscheint die kreisel dann h\u00e4ngt sich Windows komplett auf,<br \/>\nein weiteres eingreifen ist dann nicht mehr m\u00f6glich.neustart endet in endlosschleife.<br \/>\nfreundlichen gru\u00df<br \/>\nteddy58<br \/>\nPS: ab Version KB 5101650-X64  26200 <img src=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/plugins\/classic-smilies\/img\/icon_evil.gif\" alt=\":evil:\" class=\"wp-smiley\" \/> <\/p>\n<p><i>gepostet mit der <a href=\"https:\/\/www.microsoft.com\/store\/apps\/9wzdncrdfx92\" rel=\"nofollow ugc\">Deskmodder.de-App<\/a><\/i><\/p>\n"},"status":"1"},{"id":342916,"parent":342911,"author":134,"author_name":"moinmoin","author_email":"moin-moin@hab-verschlafen.de","author_url":"","author_avatar_urls":{"24":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=24&d=mm&r=g","48":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=48&d=mm&r=g","96":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=96&d=mm&r=g"},"date":"2026-08-13T13:56:27","cld_nonce":"b1ffb62e77","content":{"rendered":"<p>Falls du Hilfe m\u00f6chtest, komme ins Forum. Mit den Angaben l\u00e4sst sich leider nichts machen. Weil das ist hier der Beitrag f\u00fcr die 26H1, nicht 25H2<\/p>\n"},"status":"1"},{"id":342919,"parent":342916,"author":2428,"author_name":"teddy58","author_email":"juppi42@gmx.de","author_url":"","author_avatar_urls":{"24":"https:\/\/secure.gravatar.com\/avatar\/b9ab9f5b52eb6b6a6be82373915b7d7a5ce45d15990948862573f3acae697de9?s=24&d=mm&r=g","48":"https:\/\/secure.gravatar.com\/avatar\/b9ab9f5b52eb6b6a6be82373915b7d7a5ce45d15990948862573f3acae697de9?s=48&d=mm&r=g","96":"https:\/\/secure.gravatar.com\/avatar\/b9ab9f5b52eb6b6a6be82373915b7d7a5ce45d15990948862573f3acae697de9?s=96&d=mm&r=g"},"date":"2026-08-13T14:22:11","cld_nonce":"b1ffb62e77","content":{"rendered":"<p>es geht ja um win 25H2<br \/>\n<i>gepostet mit der <a href=\"https:\/\/www.microsoft.com\/store\/apps\/9wzdncrdfx92\" rel=\"nofollow ugc\">Deskmodder.de-App<\/a><\/i><\/p>\n"},"status":"1"}],"wp_author":{"id":134,"name":"moinmoin","description":"Ich bin nicht allwissend, was <a href=\"https:\/\/www.deskmodder.de\/wiki\/index.php?title=Kategorie:Windows_11\">Windows<\/a> angeht. Aber genau deshalb nehme ich Windows gerne auseinander und unter die Lupe, um all mein Wissen zu erweitern. <i>J\u00fcrgen<\/i>","author_avatar_urls":{"24":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=24&d=mm&r=g","48":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=48&d=mm&r=g","96":"https:\/\/secure.gravatar.com\/avatar\/fab96769102f8886245ab411df9a42a235be79261e4b44aa7ab2a555da8b86b4?s=96&d=mm&r=g"}},"cld_nonce":"b1ffb62e77","yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>KB5121000 Windows 11 26H1 [Manueller Download] Sicherheitspatch August - Deskmodder.de<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.deskmodder.de\/blog\/2026\/08\/11\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"KB5121000 Windows 11 26H1 [Manueller Download] Sicherheitspatch August\" \/>\n<meta property=\"og:description\" content=\"Auch f\u00fcr die Windows 11 26H1 hat Microsoft ein neues Sicherheitsupdate f\u00fcr den Monat August 2026 bereitgestellt. Dabei handelt es sich um die KB 5121000. Durch dieses Update wird die Versionsnummer auf die Windows 11 26H1 28000.2704 ge\u00e4ndert. Bei der&hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.deskmodder.de\/blog\/2026\/08\/11\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\/\" \/>\n<meta property=\"og:site_name\" content=\"Deskmodder.de\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Deskmodder\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-11T17:04:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-08-11T17:24:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.deskmodder.de\/blog\/wp-content\/uploads\/2021\/05\/windows-10-update-logo.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"978\" \/>\n\t<meta property=\"og:image:height\" content=\"584\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"moinmoin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Deskmodder\" \/>\n<meta name=\"twitter:site\" content=\"@Deskmodder\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/08\\\/11\\\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/08\\\/11\\\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\\\/\"},\"author\":{\"name\":\"moinmoin\",\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/#\\\/schema\\\/person\\\/a40b17a9503c4a1568ac4073bb54182a\"},\"headline\":\"KB5121000 Windows 11 26H1 [Manueller Download] Sicherheitspatch August\",\"datePublished\":\"2026-08-11T17:04:12+00:00\",\"dateModified\":\"2026-08-11T17:24:40+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/08\\\/11\\\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\\\/\"},\"wordCount\":315,\"commentCount\":3,\"publisher\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/08\\\/11\\\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/05\\\/windows-10-update-logo.jpg\",\"keywords\":[\"28000.2704\",\"KB 5121000\",\"KB5121000\",\"Windows 11 26H1\"],\"articleSection\":[\"Windows 11\"],\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/08\\\/11\\\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\\\/#respond\"]}],\"copyrightYear\":\"2026\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/08\\\/11\\\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\\\/\",\"url\":\"https:\\\/\\\/www.deskmodder.de\\\/blog\\\/2026\\\/08\\\/11\\\/kb5121000-windows-11-26h1-manueller-download-sicherheitspatch-august\\\/\",\"name\":\"KB5121000 Windows 11 26H1 [Manueller Download] Sicherheitspatch August - 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