Microsoft’s Giant September Patch Broke Remote Desktop, Excel, and USB Audio
A record security dump from Redmond left offices scrambling, then the company had to rush out emergency fixes.
Microsoft dropped its biggest "Patch Tuesday" of 2026 on September 8. Depending on who is counting, the company shipped fixes for roughly 960 to 970 security holes, including two already being used in the wild. Despite the obvious question of why 900+ "security holes" existed in the first place, that kind of volume is designed to "sound impressive" on a press release about how "on-top of security issues" the company is. In the real world, this month's Microsoft "Patch Tuesday" landed like a brick.
Within hours, Windows administrators reported Remote Desktop Services going unstable on Windows Server 2019, 2022, and 2025. Machines often ran fine for a few hours. Then connections dropped. New sign-ins failed. Some servers hung on “Please wait for the Remote Desktop Configuration.” Related tools: File Explorer, Microsoft Management Console, even the Windows Update page, locked up. In the worst cases, the only way back in was a hard reset. Rolling back the update restored remote access, but it also stripped the month’s security patches.
That is a bad trade for any shop that depends on remote workers, branch offices, or government systems still tied to Windows Server.
Excel took a hit too. After a September Office security update, copy-and-paste could fail without a warning. Users selected cells, hit paste, and nothing happened. The source stayed highlighted. The destination stayed empty. No beep. No error box. Just a spreadsheet that would not do the most basic job in the program.
USB audio devices failed on some PCs as well. Headsets and older USB Audio Class 1.0 gear stopped producing sound or would not start at all. Hyper-V users also reported Linux virtual machines losing shared folders.
Microsoft later admitted the problems and, on September 14, pushed emergency out-of-band updates. Those extra packages were meant to repair Remote Desktop, some Hyper-V issues, and the USB audio bugs. Administrators who had already applied temporary Group Policy workarounds were told they could install the new fixes without extra steps.
This is not a "one-off." Windows shops have lived through this cycle for years: a huge monthly dump, a wave of broken features, then a scramble while Microsoft writes a second patch for the first patch. The company still runs a large share of business and government computers. Hospitals, county offices, small manufacturers, and school districts do not have spare weekends to test nearly a thousand changes before they go live.
Big Tech likes to talk about security and quality in the same breath. A release this size, followed by silent Excel paste failures and remote servers that die after lunch, says the testing did not match the marketing. Security matters. So does a computer that still lets people log in, paste a number, and hear a headset. Until Microsoft treats those as the same job, Patch Tuesday will keep looking less like maintenance and more like a monthly risk on the well-being of your personal information, data, and your computer itself.
Sources / More reading
https://www.infosecurity-magazine.com/news/microsoft-releases-emergency-patch/
https://betanews.com/article/microsoft-september-update-rds-windows-server/
https://endpointweekly.com/blog/september-2026-patch-tuesday-rds-remote-desktop-break.html