Windows Transfer Help

I am using Parallels Transporter Agent to copy my Windows 7 on my Windows PC, to an external hard drive. I will then use that hard drive to install Windows 7 into Parallels on my Mac.

I am about to 'transfer' Windows 7 to the hard drive using the Transporter Agent, but I need to know if this will make a copy of the system to the external hard drive, or if it will actually transfer the Windows operating system and apps, meaning it will wipe Windows off my current PC?

I need to make sure it will leave Windows installed on my Windows PC before 'transferring' (copying hopefully) to the hard drive.

Any confirmation would be great.

Thanks.