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TAPI_E_REGISTRY_SETTING_CORRUPT
A persisted TAPI setting cannot be interpreted safely
TAPI_E_REGISTRY_SETTING_CORRUPT (0x8004004D) means TAPI or a service provider read configuration whose structure/value is invalid. This is not an invitation to reset every telephony setting or reinstall unrelated devices.
Evidence to capture
Record provider/line, registry path/value involved, expected type/range, service-provider version, and the operation that first reads the setting. Compare with a clean installation or documented schema.
Focused correction
Repair or regenerate only the invalid provider configuration using supported setup tools, then restart/reinitialize the owning service as required. Preserve unrelated line/call state.
Technical references
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