![\"Windows](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2025\/10\/1760766548_72_960x0.jpg\")
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This is a \u2018total disaster\u2019<\/p>\n
NurPhoto via Getty Images<\/p>\n
Just days after Microsoft killed security updates<\/a> for 500 million Windows 10 users, there\u2019s bad news for Windows 11 users as well. A new, mandatory security update is a \u201ctotal disaster\u201d and an emergency update has suddenly been confirmed.<\/p>\n The warning comes courtesy of Windows Latest<\/a>. Microsoft admits that Windows 11 KB5066835 breaks localhost connections, \u201cwhich means locally hosted apps can no longer connect to your network.\u201d But there are also multiple installation failures and bugs blocking peripherals and accessories from working properly.<\/p>\n Users going online to fix update issues are being warned to stop. \u201cDon\u2019t try your luck with internet solutions. They don\u2019t work.\u201d Instead, wait for the update. <\/p>\n ForbesMicrosoft Suddenly Offers Windows 10 Update In Store\u2014Buy NowBy Zak Doffman<\/a><\/p>\n \u201cMicrosoft says it\u2019s rolling out an emergency patch that should address localhost-related issues in Windows 11 24H2\/25H2, but remember, the hotfix could take longer than 48 hours to show on affected PCs.\u201d Meanwhile, Microsoft says \u201caffected users should check for updates and reboot their PC, even if they do not see any newer updates listed.\u201d<\/p>\n Windows Latest has found a \u201cregression in the kernel-mode HTTP server (HTTP.sys). When a browser or app tries to connect to HTTP\/2 to services hosted on 127.0.0.1, HTTP.sys mishandles the HTTP\/2 handshake\/frames and resets the connection.\u201d<\/p>\n The website warns that this is significant \u201cbecause the Windows update broke IIS, which affects anything behind HTTP.sys. Windows is designed to handle 127.0.0.1 requests by loading TTP\/2 session in the kernel, which then sends the request to the IIS worker, ASP.NET Core Module or your app.\u201d<\/p>\n Separately, accessory failures affect \u201csome Logitech peripherals\u201d and \u201cmouse and keyboard not working in WinRE (Windows Recovery Environment).\u201d<\/p>\n As ever, there are a number of green-fingered workarounds for these various issues, but for almost all Windows 11 users, the reality is you\u2019ll await the emergency update if you\u2019re affected. It\u2019s likely that will be here quickly, likely within a day or two.<\/p>\n ForbesApple Stops iPhone Users Replying To Millions Of Texts\u2014What You DoBy Zak Doffman<\/a><\/p>\n If you\u2019re still running Windows 10<\/a> and reading this with a sense of relief, just make sure you\u2019ve updated your PC with the last ever security fixes you will receive unless and until you enroll in the 12-month ESU program to keep Windows 10 until 2026.<\/p>\n