Windows 11 KB5124008, released on September 8, has caused various issues, including disruptions to WSL-based applications and Remote Desktop sessions. Users have reported problems with File History backups and instability in Explorer.exe, leading to system and GPU crashes. Microsoft confirmed a bug affecting applications using HCS-managed Linux virtual machines, particularly Claude Cowork, which is experiencing connectivity issues. Remote Desktop Services (RDS) are malfunctioning, leading to connection failures and sign-in problems. Additionally, some users face black screens upon sign-in due to Explorer.exe crashes. Reports indicate that File History is not recognizing external backup drives, and serious GPU issues have been reported on AMD Radeon systems, including driver timeouts and system freezes.