GoKawiilMicrosoft's September 2026 Patch Tuesday updates knock out Remote Desktop Services on Windows Server
Windows admins report that this month's cumulative updates for Windows Server 2019, 2022, and 2025 are breaking Remote Desktop Services, with servers working fine for a few hours before connections begin to fail. Existing sessions can get stuck unable to disconnect, new logins hang and time out, and in many cases only a hard reset restores service. Some administrators say uninstalling the September patch is the only reliable fix so far.
GoKawiil's interpretation of the reporting above, not reported fact.
Remote Desktop Services underpin remote work and virtual desktop access for many organizations, so a patch that forces hard resets or requires rollback creates real operational risk during business hours. The apparent deadlock between the RDP service and the Local Session Manager suggests a core regression in session handling rather than a niche edge case, meaning it could affect a wide swath of enterprise deployments until Microsoft issues a fix.
- September 2026 cumulative updates are breaking RDS on Server 2019, 2022, and 2025.
- Symptoms include hung logouts, failed new connections, and required hard resets.
- Debugging points to a deadlock between RDP and the Local Session Manager; rollback is the current workaround.
StarTech.com USB Crash Cart Adapter — When RDP dies and the only fix is a hard reset, you need out-of-band access to the box. StarTech's USB crash cart adapter lets you plug a laptop into a server's VGA/HDMI and USB ports and drive its console directly, no rack KVM required. A handy thing to keep in the bag on Patch Tuesday week.
See StarTech.com USB Crash Cart Adapter on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: bleepingcomputer.com, 2026-09-10
Published there as: “September Windows Server updates break Remote Desktop Services”
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