|First I would recommend spell out all of your problems since system recovery is a drastic measure and should be used when all else fails.|
Second, make a set of recovery disks, they are very useful if your hard drive completely fails since your recovery partition is on your hard drive (you would then have to buy them from Sony).
Third, to access your recovery system, you do this outside of windows. There is a key to tap repeatedly (I believe it is F10 on Sony, if not, recheck your manual or their website) during start up that will direct your system to boot from the recovery module instead of windows. It is here that you would launch a recovery (possibly a repair, but not sure).
A recovery will return your hard drive to the same as it was when you purchased it. There will be no windows updates, there will be no programs that you have since installed, there will be no personal files (pics, letters, music, favorites, etc), there will be no hardware drivers (other than what was factory installed) and all of your preferences (desktop settings, home page, email set up, etc) you set will be gone. You will have all of this to do over again.
You have to be a little bit crazy to keep you from going insane.
If all else fails, read instructions.