Laptop BitLocker failing on drive with alternate data streams

4.5

Files with hidden "Alternate Data Streams" (ADS) cause encryption errors.

Symptoms
  • Error code
  • Metadata error
  • Hang
Possible Causes
  • ADS bloat
  • Malware
  • System files

Step-by-Step Fix

1

Scan for ADS

Use a tool like "Streams" from Sysinternals.

2

Clear ADS

Remove non-essential data streams.

3

Run Antivirus

Ensure the ADS aren't being used by malware.

When to See a Technician

ADS are often used by "Zone.Identifier" to mark files from the web; clearing them is safe.

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