Ethernet not working and weird file showing up. - Microsoft Q&A
Understanding the RTK-NIC-DRIVER-INSTALLER.sfx.exe for Windows 11 rtk-nic-driver-installer.sfx.exe windows 11
Generally, this file is safe if it originated from your hardware device. However, some malware analysis sandboxes flag it as "suspicious" or "malicious" because it drops system drivers and modifies internet settings—actions typical of both legitimate driver installers and malware. Ethernet not working and weird file showing up