Microsoft: Recent Windows updates may fail to install via WUSA

What’s new: Microsoft has addressed a known issue causing Windows update failures when using the Windows Update Standalone Installer (WUSA) to install updates from a network share. This issue affects Windows 11 24H2 and Windows Server 2025 systems, resulting in error ERROR_BAD_PATHNAME when multiple .msu files are present. The problem arises with updates released on or after May 28, 2025 (KB5058499).

Who’s affected

IT admins managing Windows 11 24H2 and Windows Server 2025 systems on enterprise networks may encounter this issue, particularly when updates are installed from network shares.

What to do

• For managed devices, apply the Known Issue Rollback Group Policy to resolve the issue.
• As a workaround, save .msu files locally and install updates from that location.

Sources

• BleepingComputer