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"CBT driver installation completed with error: The file exists"

Leonardo Balboni

Products:

  • Veeam B&R Community Edition 12.3.1.1139 (Windows Server 2022)
  • Windows Agent 6.3.1.1074 (Windows 11 Pro for Workstations, version 24H2)

Using B&R Console I accidentally uninstalled CBT Driver from the Windows 11 PC, and now I cannot reinstall it anymore.
The CBT driver is also missing from installed Windows apps and program list in the legacy Control panel.
I tried to uninstall completely all components on that client, I removed it from my B&R Protection group, restarted it many times, but no avail.
I also tried to install the standalone Agent, but the CBT driver install/uninstall option is missing from settings.
Even command line method fails:

Veeam.Agent.Configurator.exe -uninstallCBTDriver

ExitCode: 0



Veeam.Agent.Configurator.exe -installCBTDriver

ExitCode: 20

Errors:

Failed to perform the operation.

File exists

The only way I haven't tried yet is with command line by booting the PC from Veeam Recovery Media.

In attachment: log file.

Any ideas on how to solve?
BTW, I’m wondering: on my computer I don't have databases; can I safely ignore the problem, and use the default CBT mechanism?

Best answer by Leonardo Balboni

FYI, I managed to solve my problem by myself.

I opened device manager on the Windows 11 for Workstations device, selected the “by driver” visualization, searched for the CBT driver .inf entry (veeamvolumect.inf) and removed it:


I restarted the PC, and after a few minutes the Veeam B&R server automatically reinstalled the Veeam CBT Driver on it.

Regards,

Leonardo.

 

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3 comments

Chris.Childerhose
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Since this was a managed agent by VBR you will not be able to get the CBT driver working properly with the standalone installer.  Have you tried to add the PC back in to the Protected Computers and adding CBT driver again?

If that does not work this is getting technical and will require support to help with cleanup of things to get it working.  I would try adding back to VBR and if that does not work then contact support.

Chris Childerhose - VMCA2024 | VMCE2023 | VMCE-SP2024 | Veeam Vanguard 8* | Veeam Legend 5* | vExpert 6* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
Tommy O'Shea
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Leonardo Balboni
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  • March 22, 2025

FYI, I managed to solve my problem by myself.

I opened device manager on the Windows 11 for Workstations device, selected the “by driver” visualization, searched for the CBT driver .inf entry (veeamvolumect.inf) and removed it:


I restarted the PC, and after a few minutes the Veeam B&R server automatically reinstalled the Veeam CBT Driver on it.

Regards,

Leonardo.

 

Chris.Childerhose
Tommy O'Shea
Dynamic
3 people like this
  • Chris.Childerhose
    Chris.Childerhose
  • Tommy O'Shea
    Tommy O'Shea
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    Dynamic
Chris.Childerhose
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Great.  Glad to hear you were able to resolve the issue.  I forgot about Device Manager.  😋

 
 
 
Chris Childerhose - VMCA2024 | VMCE2023 | VMCE-SP2024 | Veeam Vanguard 8* | Veeam Legend 5* | vExpert 6* | VCAP-DCV/VCP-DCV | Object First Ace | Cisco Champion | Twitter: @cchilderhose | Blog Site – https://just-virtualization.tech
Tommy O'Shea
Leonardo Balboni
2 people like this
  • Tommy O'Shea
    Tommy O'Shea
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    Leonardo Balboni

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