In the age of inexpensive 2 terabyte hard drives, a few gigs might not matter, but there are situations where you might need that extra space.
For instance, if you purchase a solid-state drive to contain your operating system, applications and games, you'll grow to cherish every salvageable gigabyte. There a few simple adjustments you can make within Windows to regain some drive space.
For starters, you can disable hibernation. Hibernation basically writes your current system state to a non-volatile memory source, such as your primary HDD or SSD, allowing you to turn off your system and restore your progress at a later date. To save a little more space, you could also reduce the size (or entirely disable) system restore. Granted, it's better to be safe than sorry, but there are better backup solutions out there. Read more at TechSpot.