Here is a quick way to get a generalized VM up and running on your favorite hypervisor:

1. Install your OS
2. Install virtualization tools (VMware Tools, XenTools, etc.)
3. Install patches and make necessary OS/System changes
4. Run C:\Windows\System32\sysprep\sysprep.exe
   • Select Enter System Out-of-Box Experience (OOBE)
   • Select Shutdown
   • Click OK

5. After the VM has been shutdown, convert it to a template
6. To test, create a new VM from the template
7. At boot up, Windows setup will begin
8. When prompted, complete the setup wizard and begin using your VM