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WU_E_PT_INVALID_OPERATION
WU_E_PT_INVALID_OPERATION is a protocol-state error. It normally follows an earlier failure or a cancelled request, so the most useful diagnostic evidence is the preceding Windows Update log entry.
How to handle it
- Start a new update scan or session instead of trying to continue the failed operation.
- Find and resolve the first earlier HRESULT in the same request sequence.
- Avoid treating this code as proof of a damaged update package unless a package-validation error is also logged.
Microsoft: WUA networking error codes
Microsoft: Windows Update log files
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