Have you ever opened your Downloads folder, spotted a file named rtk-nic-driver-installer.sfx.exe , and thought: “Do I need this? Is it a virus?”
When in doubt: delete it. Windows 10 and 11 automatically install basic RealTek NIC drivers, so you may not need this file at all. If you later discover you do need it, you can always re-download it from your PC manufacturer’s website. what is rtk-nic-driver-installer.sfx.exe