Laptop unable to use BitLocker on drive with VSS service storage efivarfs tampering

4.5

Efivarfs filesystem drivers (for UEFI variables) have been tampered with.

Symptoms

BitLocker error
Sync error
Service crash

Possible Causes

Malware
Buggy driver

Step-by-Step Fix

1

Update Efivarfs Drivers

Ensure the driver is original and signed.

2

Check for Rootkits

Look for viruses that target UEFI variables.

3

Run SFC

Repair system files.

When to See a Technician

Efivarfs allows managing UEFI variables; tampering can brick the system.

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