Ethernet lacks a valid IP address.
Ethernet lacks a valid IP address.
You're facing a frustrating situation, and it's understandable to feel overwhelmed. Let's break down what might be happening and how you can try to fix it. It sounds like your network setup is causing issues, especially since other devices are working normally.
Here are some key points from your report:
- PC specs: i7 6700K, Corsair Dominator Platinum, 16GB RAM, 3000MHz
- Internet connection lost after a short break
- Windows Network Diagnostics reported "Ethernet doesn't have a valid IP configuration"
- Default gateway is empty
- IPv4 address appears to be 169.254.173.107
- You've tried restarting PC, router, and modem
- Multiple network reset commands executed
- Ethernet driver reinstalled
Possible causes:
1. **DHCP Server Issue** – The router or modem might not have a valid IP assignment.
2. **Network Interface Problems** – The Ethernet card could be misconfigured or faulty.
3. **Driver Conflict** – The Ethernet driver might be corrupted or outdated.
4. **Firewall or Security Software** – Temporary blocking of network requests.
Recommendations:
- Check if your router has a DHCP server running; restart it if needed.
- Try connecting another device to confirm the issue is specific to your PC.
- Reset your Ethernet adapter using Windows Settings > Network & Internet > Change adapter settings > Advanced options > Troubleshoot > Network troubleshooter.
- If you're on Windows 10 or later, try updating the network drivers via Device Manager.
- Consider testing with a different Wi-Fi channel or switching to mobile data if available.
If you need further help, feel free to share more details about your router model and any error messages you see. You're not alone in this—many users face similar challenges!
It makes no difference if you assign a fixed IP address to your adapter; if performance issues persist, consider testing with a different network interface.
You attempted to reset the router and checked its IP address, which is 169.253.173.107, indicating it’s not assigning IPs correctly.
Choose your Wi-Fi and Ethernet devices, then set up a bridged link. After that, turn off the bridge connection and remove it completely. This unusual approach seems to successfully reset the adapters in Windows 10 when standard methods fail.
Start from a Linux live CD or USB to eliminate software issues.
When your device can't get a DHCP address, use these static settings: IP Address 192.168.1.130, Subnet mask 255.255.255.0, Default Gateway 192.168.1.1, DNS 192.168.1.1. Make sure you entered all the information correctly and consider clearing your network adapter from Device Manager before restarting.
I face a comparable issue with one of my virtual machines on an ESXI server. It isn't receiving IP addresses from the DHCP server and can't ping any devices on the LAN. The VM runs Windows 8. My approach was to remove the network adapter via the Device Manager and then restart the system. After rebooting, the system automatically reinstalled the network card and began getting an IP address from the DHCP server. Sometimes Windows behaves unpredictably, making the solution seem illogical.
I agree with beersykins advice. Unplug Linux from the thumb drive. Once internet is back and steady, Windows likely handled something during your absence. If it fails to appear or is unreliable, your network card may be faulty.