"Requires SPPRedist64.msi". This file is missing from my PC.
SPPRedist64.msi,stands for "Service Pack Redistribution Package 64 bit. It is a basic component that *should* be automatically downloaded whenever your PC restarts for updates. what i recommend you do is ensure your version of windows is up to date or head
over to MS and download the most up to date Service Pack.
As i do not know any other information about your PC what i would recomend is going here:
http://www.microsoft.com/en-us/download/details.aspx?id=13523 and selecting the box to the right that says "Free PC Updates" and select "Run Microsoft Update". This should help you
get the SPPRedist64.msi back and thus allow System Ninja to do its thing.
If you need any other assistance let me know.