Midterms are upon me, so I'm copping out on you by providing a "guest post" of sorts by my beloved. He disagrees very much with my last post, and makes some very good points. Since this blog is about question-asking rather than answer-giving, I thought I'd put it up here for those of you who don't read the comments section.
(This is all the Cobbler's writing and has not been edited in any way:)
Not really. A restore point sets the system back how it was. God's restoration of grace _generally_ does not wipe out concupiscence (because of our lacking, mind you) or fix all the problems caused by our previous sin. Further, original sin comes from the start for an individual other than Adam and Eve -- Baptism would be like a restore point fixing up a computer to better than it started as, like an upgrade rather (more on that in a minute). Unless one was using the analogy to the whole human race, with the restore point being the restoration of human nature (the general redemption of man) and the file recovery being the individual redemption of individual humans. Even then it's a very loose analogy because Christ's not a backup copy of us, He's one of the files Himeself.
On Baptism as upgrade I must answer yes and no. In Baptism our human nature is restored and the divine nature, in grace, is added. In an upgrade the ultimate nature of the computer as a computer remains but the nature of it as whatever particular thing it is is entirely revamped. It'd be like Baptism leaving us animals but making us angelic rather than like fixing us humans and making us divine.
Maybe a better one is corruption of files and/or the system by viruses or by simple mismanagement. Mortal sin would be like getting the system corrupted, venial ones like getting individual files corrupted. It tends to spread (especially if it's a virus or similar problem) or at least disrupt other aspects than the specific corrupted thing, and while it can generally be put back in working order it is hard to undo all the damage. The flaw in this analogy is that it's the user's (i.e. our) imperfection that prevents the decorruption/anti-virus stuff from being %100 effective and the ultimate source of the fixing (God) is in no way lacking in the job He does, which doesn't parallel well or easily to the computer analogy at all.
In short, no, we're just not much like computers as far as salvation goes.