Laptop unable to use BitLocker on drive with VSS service key tampering

4.5

The cryptographic keys used by VSS have been deleted or modified.

Symptoms
  • BitLocker error
  • Security alert
  • Service crash
Possible Causes
  • Malware
  • Registry cleaners

Step-by-Step Fix

1

Restore Crypto Keys

Check C:ProgramDataMicrosoftCryptoRSAMachineKeys.

2

Run SFC

Repair system crypto components.

3

Check for Malware

Ransomware often targets these keys.

When to See a Technician

Machine keys are essential for system-level encryption; if they are gone, VSS breaks.

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