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WU_E_EXCLUSIVE_INSTALL_CONFLICT
WU_E_EXCLUSIVE_INSTALL_CONFLICT means that an exclusive update cannot be installed at the same time as other updates. The update must be handled as an isolated installation operation.
How to handle it
- Remove competing updates from the installation collection and install the exclusive update separately.
- Plan for a restart if the exclusive update requires one.
- Re-scan after completion before installing deferred updates, because applicability can change.
Rebuild the installation collection around the exclusive item
WUA installs the update collection supplied to the installer. When one member requires exclusive installation, the conflict is with the composition of that request, not with network delivery. Capture the identity of the exclusive update, install it in its own operation, and use the returned installation result to determine whether a restart is required.
A new search after the exclusive operation is important because Windows Update detection can change when prerequisites, servicing components, or supersedence state change. Reusing the original collection can submit updates that are no longer applicable. In deployment software, treat exclusivity as scheduling metadata and serialize the operation before constructing the next batch.
References
References
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