Laptop BitLocker failing on drive with VSS service authorization tampering
4.5
The VSS service has lost its authorization to perform disk operations.
Symptoms
- BitLocker error
- Privilege error
- Service crash
Possible Causes
- User Rights Assignment changes
- Malware
Step-by-Step Fix
1
Check User Rights
Ensure "Perform volume maintenance tasks" is granted to administrators.
2
Reset Local Security Policy
Restore default security settings.
3
Run SFC
Repair system security descriptors.
When to See a Technician
Authorization is about "what" the service can do; VSS needs high-level disk access.
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