well...in my experience hibernation does more harm than good (not really harm...just annoyance)...it's rare that i've ever had a system that goes into hibernation and then comes back out without having to restart the computer anyway....plus...if i'm away from my computer for any extended period of time i turn it off
hibernation basically takes a snapshot of your system at a given time period (i.e. after 30 minutes or an hour) and then turns the computer off...then when you turn it on it opens itself back up exactly how you left it (with applications open etc..)...if you never leave your computer alone with stuff open that you want to get back to (note this doesn't apply to things like file downloads or chat communications since those rely on active communication which will terminate when the system hibernates) then you don't need hibernation on...it's used to save time/electricity
apparently the "found" folder is a set of data recovered during a checkdsk operation...you can look through that folder and see if any files contain anything useful... i've seen people suggest
ChkMate as a useful application for checking these files and recovering them