Solving 'Trojan.Flush.G - Cannot Be Removed From An Unsupported File' Problem With Norton Internet Security

When we executed a complete scan of Norton Internet Security, it identified the virus Trojan.Flush.G as a high risk threat in an exe(executable) file. Unfortunately Norton is not capable of removing this virus. It just displays the message

Trojan.Flush.G - Cannot Be Removed From An Unsupported File

Not sure about the reasons why Norton is not able to remove this virus, but there a manual way through which we can remove the virus. Follow the step provided by Norton website and remove the virus.