Hello, I would like to report a reproducible FilterManager event related to the Bitdefender Virtual Disk on my Windows 11 system. After installing Bitdefender Total Security, I consistently observe the following Windows system event: Event ID: 3 Source: Microsoft-Windows-FilterManager Device: \Device\Harddisk4\DR4 Final Status: 0xC03A001C The event indicates that the Filter Manager failed to attach to the volume associated with the Bitdefender Virtual Disk. Could you please clarify: * Whether this behavior is expected under certain Windows 11 conditions, or * If it indicates a known issue related to the Bitdefender Virtual Disk or its filter driver If needed, I can provide additional logs or diagnostic information. Thank you for your support. Environment * OS: Windows 11 Pro (Build 26200.8457) * CPU: AMD Ryzen 7 7800X3D * GPU: Radeon RX 7900 GRE * Bitdefender Total Security(Build: 27.0.59.332) * Storage: NVMe SSD (system drive) * System usage: Standard desktop usage (no special disk configuration or virtualization setup) Observed Behavior * The Bitdefender Virtual Disk (approximately 32 MB) appears in Disk Management as expected. * The FilterManager Event ID 3 is logged intermittently. * The event typically appears after system startup. * The event does not appear when Bitdefender is uninstalled, suggesting a direct relation to Bitdefender components. Impact * No visible impact on system stability. * No crashes, freezes, or performance degradation observed. * The system continues to function normally despite the logged event.

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FilterManager Event ID 3 related to Bitdefender Virtual Disk on Windows 11

Jamu849

Hello,

I would like to report a reproducible FilterManager event related to the Bitdefender Virtual Disk on my Windows 11 system.

After installing Bitdefender Total Security, I consistently observe the following Windows system event:

Event ID: 3
Source: Microsoft-Windows-FilterManager
Device: \Device\Harddisk4\DR4
Final Status: 0xC03A001C

The event indicates that the Filter Manager failed to attach to the volume associated with the Bitdefender Virtual Disk.

Could you please clarify:

Whether this behavior is expected under certain Windows 11 conditions, or
If it indicates a known issue related to the Bitdefender Virtual Disk or its filter driver

If needed, I can provide additional logs or diagnostic information.

Thank you for your support.

Environment

OS: Windows 11 Pro (Build 26200.8457)
CPU: AMD Ryzen 7 7800X3D
GPU: Radeon RX 7900 GRE
Bitdefender Total Security(Build: 27.0.59.332)
Storage: NVMe SSD (system drive)
System usage: Standard desktop usage (no special disk configuration or virtualization setup)

Observed Behavior

The Bitdefender Virtual Disk (approximately 32 MB) appears in Disk Management as expected.
The FilterManager Event ID 3 is logged intermittently.
The event typically appears after system startup.
The event does not appear when Bitdefender is uninstalled, suggesting a direct relation to Bitdefender components.

Impact

No visible impact on system stability.
No crashes, freezes, or performance degradation observed.
The system continues to function normally despite the logged event.

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Accepted answers

Flexx

https://community.bitdefender.com/en/discussion/106452/filtermanager-event-id-3-related-to-bitdefender-virtual-disk-on-windows-11

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