Ethernet not working and weird file showing up. - Microsoft Q&A
Sometimes the third-party SFX installer is the real problem. Windows 11 includes inbox Realtek drivers that do not use rtknicdriverinstallersfxexe . rtknicdriverinstallersfxexe windows 11 fixed
2024–2025 (Current OS cycle) Issue Category: Realtek Network Interface Controller (NIC) Driver Installation Failure / SFX Extraction Hang Affected OS: Windows 11 (21H2, 22H2, 23H2, 24H2) Ethernet not working and weird file showing up
Only if you are experiencing network dropouts, limited speed (100 Mbps instead of 1 Gbps), or error codes in Device Manager. Otherwise, leave it alone. leave it alone.