Vstor2 Converter Virtual Storage Driver service failed to start due to the following error

One of the VM’s after the P2V was throwing error message


Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7000
Date: 10/11/2008
Time: 12:41:43 PM
User: N/A
Computer: xxxx
Description:
The Vstor2 Converter Virtual Storage Driver service failed to start due to the following error:
The system cannot find the file specified.

It was really strange to find out why I am getting driver error when I had uninstalled all the drivers. After little bit of research I found that same physical machine was used for P2V using VMware converter and this version has some known issue
http://www.vmware.com/support/converter/doc/releasenotes_conv3.html

Manual cleanup required of some Converter Agent files from remote source physical machineIn some cases, the automatic cleanup of Converter Agent files from the system on which it ran is incomplete. If there are vmware-ufad-p2v-XXXXX subdirectories remaining under %SystemRoot% on the remote source physical machine after completion of the import (either successful or failed), automatic cleanup was not totally successful, and might cause future import attempts to fail. To clean up manually (recommended), follow these steps:
1. Launch regedit and navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
2. Remove the stcp2v30 key
3. Remove the vstor2-p2v30 key
4. Remove all vmware-ufad-p2v-XXXXX keys
5. Remove all courier-XXXXX keys
6. Reboot
Under %SystemRoot%\system32, remove all vmware-ufad-p2v-XXXXX subdirectories


So when did P2V for the same physical machine everything got virtualized with the same settings and that was causing the problem. After looking at the registry of virtual machine I found the key for “Vstor2” HKLM\SYSTEM\ConterSet001\Services . Delete the key and rebooted the VM and error went off.