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WU_E_SETUP_ALREADY_INITIALIZED
WU_E_SETUP_ALREADY_INITIALIZED means the Windows Update Agent setup routine reached initialization twice when it should have initialized only once. It can follow a concurrent or interrupted setup attempt.
What to check
- Make sure another Windows Setup, repair, or Windows Update Agent operation is not running.
- Reboot if an earlier servicing or setup transaction ended abnormally.
- Use the log timeline to find the first setup invocation, not only the later duplicate-initialization message.
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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