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

4.5

The queries used to discover VSS writers are being intercepted or modified.

Symptoms
  • BitLocker error
  • Writers missing
  • Service crash
Possible Causes
  • Malware
  • Registry corruption

Step-by-Step Fix

1

Check for Malware

Some viruses hide writers to prevent backups.

2

Reregister VSS

Fix the discovery mechanism.

3

Run SFC

Repair system files.

When to See a Technician

Discovery queries are how BitLocker finds out what apps need to be "frozen".

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