It is recommended to slipstream these into your Windows 7 Installation Media if not present. For more details see Converting your Windows 7 SP1 Installation Media into a Bootable USB 3.0 Flash Drive. If you don’t have Windows 7 SP1 Installation Media see Downloading Windows 7 SP1 from Microsoft’s Techbench. Alternatively see the Unofficial Download Windows 7 SP2 OEM and Retail .iso.
Windows 7 SP1 (2011)
Windows 7 SP2 Perquisite Updates
Windows 7 SP2 (2016)