|I'm not sure what you are asking, You stated that Roxio won't do it but you don't want to install other software that will.|
You listed your operating system as Windows XP. iMovie will only run on Macs, iPods, iPhones & iPads, not on XP.
You also mentioned wanting to burn it as a DVD and playing it on a VCR. DVD's don't play in VCR's.
If you Google "Powerpoint to video", you will find lots of software to do what you are trying to accomplish. And you shouldn't have problems with it conflicting with Roxio.