Laptop BitLocker failing on drive with VSS service storage evm tampering

4.5

Extended Verification Module (EVM) has been tampered with.

Symptoms
  • BitLocker error
  • Access Denied
  • Service crash
Possible Causes
  • Malware
  • Buggy driver

Step-by-Step Fix

1

Update EVM Drivers

Ensure the driver is original and signed.

2

Check for Rootkits

Look for viruses that target EVM.

3

Run SFC

Repair system files.

When to See a Technician

EVM protects file metadata; tampering can allow bypassing security attributes.

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