Error 29142 when reinstalling VMware vCenter Converter Standalone agent

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NOTE: this solution is valid even with the VMware vCenter Converter Standalone 5.5.

Many administrators use the useful VMware vCenter Converter Standalone tool to prepare (even for testing) tests systems from productions client or servers.

This tool is very stable but sometimes, after we have installed the agent, ran the P2V or V2V conversion and checked that the VM has been created successfully, we could have the need to re-run this conversion from the same system (previously we have used the option Automatically uninstall the files when import succeeds).

If we have used the Automatically uninstall the files when import succeeds option the first time that we have converted a remote system (or remote VM) and then we repeat the same process on the same system we could have the error 1.603 during the remote agent deploy.

If you uninstall Converter Standalone Agent from a Windows Server 2008 or Vista 64-bit machine and do not restart it, a subsequent Converter Standalone Agent installation (using the VMware-Converter-Agent.exe found in C:\Program Files\VMware\VMware vCenter Converter Standalone) might fail with the following error message:

Error 29142 unable to start vstor 2 mntapi 1.0 driver. 

Solution: Restart the Windows Server 2008 or Vista machine and try installing Converter Standalone Agent again.

Using VMware-Converter-Agent.exe on the remote system (to convert in VM) the "server" will not ask you anymore to uninstall the agent.