Laptop BitLocker failing on drive with compressed file errors

4.5

NTFS-level compression is conflicting with the BitLocker encryption process.

Symptoms
  • Slow encryption
  • High CPU usage
  • Error 0x80070057
Possible Causes
  • "Compress this drive" enabled
  • Legacy compression

Step-by-Step Fix

1

Disable NTFS Compression

Uncheck "Compress this drive to save disk space" in drive properties.

2

Decompress All Files

Wait for the system to decompress every file before starting BitLocker.

3

Check for CompactOS

If using CompactOS, ensure it's compatible with your Windows version.

When to See a Technician

You cannot effectively compress encrypted data; disable compression before using BitLocker.

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