| Details | |
| Product: | Windows Operating System |
| Event ID: | 4149 |
| Source: | Ci |
| Version: | 5.0 |
| Component: | Application Event Log |
| Symbolic Name: | MSG_CI_USN_LOG_UNREADABLE |
| Message: | Read of USN log for NTFS volume %1 failed with error code %2. Volume will remain offline until the Indexing Service (cisvc) is restarted. |
| User Action | |
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Contact Microsoft Product Support Services. |
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