Realtek network adapters are ubiquitous in the PC market. They are found on the motherboards of most Desktop PCs, Laptops, and All-in-One computers from manufacturers like ASUS, MSI, Dell, HP, and Lenovo. Because the hardware is so common, the driver files are equally prevalent.
Typical behavior:
Ethernet not working and weird file showing up. - Microsoft Q&A what is rtk-nic-driver-installer.sfx.exe