FOLLOWING the Windows 11 cumulative update KB5127648, many players began experiencing persistent Xbox Live authentication failures. The issue causes games that rely on Xbox Live login to fail to sign players in, with notable impact on popular casual titles such as Microsoft Solitaire Collection and Microsoft Mahjong. When a player tries to access their Xbox Live profile, the signing handshake fails and the game client exits with error code 0x87DD0005.
The problem appears to extend beyond first‑party titles to third‑party games that require Xbox Live credentials, leaving players unable to start or resume sessions.
The article cites user reports across Microsoft Community forums and notes that attempts at standard troubleshooting—restarting the OS, reinstalling software, clearing saved credentials, or rolling back the update—have not produced lasting fixes. While uninstalling the October 2026 patch did not immediately resolve the fault, a community‑developed workaround has been identified. The effective temporary fix involves altering the Microsoft Account Sign‑in Assistant service so that it runs automatically.
Specifically, users should open Task Manager, go to the Services tab, find the Microsoft Account Sign‑in Assistant service, and set the startup type to Automatic, then restart the service to restore Xbox Live sign‑in and resume gameplay. The article presents this as a proven workaround rather than an official, Microsoft‑issued patch, with ongoing expectation of an engineering‑level fix.