Print2PDF Error Message code 80040154

Hello, TechyV! I'm having trouble installing Print2PDF software on my computer.
I have installed this program on my laptop, which runs on OS Windows Vista. My desktop has Windows XP as OS.
Do I need to change my desktop's OS? If this is not the reason for the error, please give suggestions or similar situations.
Thank you very much!

Print2PDF
Print2PDF Error code 80040154. Class not registered. OK
