Pattern to record: Free space is implausible or files overlap and report read errors.

Identify the storage layer

This guide applies to an NTFS-formatted Windows volume. Confirm the file system and physical-drive condition before interpreting directory, permission or repair messages; logical repair cannot make failing media reliable. One possible explanation is that used and free space records no longer agree with actual file extents.

Protect data before repair

Avoid writing repairs to the only copy of important data. Continuing normal writes can allocate blocks still belonging to files.

Evidence to check on the protected copy

1. Image or clone unstable media first, then examine file-system and storage health separately.
2. Validate allocation structures against file records on a clone.

Recovery and verification

If the checks support this cause, rebuild the allocation metadata or recover files to a clean volume. Verification should cover verified startup, file permissions, large file reads, updates and backup.

For an assessment of your Windows computer, contact AEPC in Burswood or call 027 908 8880. Provide the model and the conditions that reproduce this problem. Workshop visits are by appointment.