I am not sure what account will Cryptolocker use, but I don't particularly trust System. How hard - or easy is to subvert System?
McKnife
It is only possible if you are already administrator. And even then, you still need to circumvent UAC. So it is hard. And please don't think it would act as system. It would definitely act as the user himself, because that way, it could do maximum damage. The system account could not reach network drives, that's why.
mrmut
ASKER
Ha! I forgot about System network access! The UAC is a problem, as it is off or nonexistent on most systems I am looking to implement this.
I will probably just ban everyone from backup folder, and that's it.