Have you updated Vista with all the current updates? Have you gone thru the Microsoft KB artilces and gotten the updates available there that apply to the Hibernation issues? I know of at least 2 that were not sent thru WU.
Also is this a desktop or a laptop?
I do not accept support questions via EMail, PM, IM or my G+ page!
Phone: LG Optimus G Pro
Running: Stock JB from LG with Nova Launcher