The reason for using the sysprep is to customize the guest OS, If you are deplying a Windows VM with a template and if you are not customizing the VM then the SID will be the same and you face issues.
If you are running Windows Vista and above or Windows 2008 and above then there is no need to create a sysprep file as they are include in the guest OS.
In the VMware documents you will Create a Customization Specification for Windows which would tell how to create sysprep
Check this KB Sysprep file locations and versions