Laptop unable to use BitLocker on drive with VSS initialization failure

4.5

The VSS subsystem fails to start during the BitLocker setup phase.

Symptoms

BitLocker error at start
Service won't start
Event ID 8193

Possible Causes

Permission issues
Registry corruption

Step-by-Step Fix

1

Check VSS Permissions

Ensure the "Network Service" has access to VSS registry keys.

2

Reregister VSS

Use a reregistration script.

3

Check System Clock

Incorrect time/date can cause security initialization failures.

When to See a Technician

Initialization failures are usually related to security permissions or corrupted registry entries.

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