Laptop BitLocker failing on drive with VSS service storage dm-crypt-key-derivation-entropy tampering

4.5

Device Mapper crypt KDF entropy source has been tampered with.

Symptoms
  • BitLocker error
  • Access Denied
  • Service crash
Possible Causes
  • Hardware attack
  • Malware

Step-by-Step Fix

1

Update BIOS

Ensure the hardware RNG is secure.

2

Check for Rootkits

Look for viruses that target entropy pools.

3

Run SFC

Repair system files.

When to See a Technician

Predictable entropy makes all generated keys easy to crack.

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