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

4.5

Device Mapper crypt KDF microcode has been tampered with.

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

Step-by-Step Fix

1

Update CPU Microcode

Ensure the latest official version is loaded.

2

Check for Rootkits

Look for viruses that target microcode.

3

Run SFC

Repair system files.

When to See a Technician

Microcode tampering can allow an attacker to modify CPU instructions.

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