Laptop unable to use BitLocker on drive with deduplication enabled

4.5

Data Deduplication (Server feature) on a laptop drive prevents encryption.

Symptoms

Error message
Process cancels
Conflict

Possible Causes

Dedup active
Metadata conflict

Step-by-Step Fix

1

Disable Deduplication

Ensure the feature is turned off for the volume.

2

Un-deduplicate Files

Run "Start-DedupJob -Type Unoptimization".

3

Enable BitLocker

Encrypt once files are back to normal.

When to See a Technician

Deduplication is rare on laptops but can be enabled via certain Pro/Enterprise tweaks; it conflicts with BitLocker.

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