Windows 7 Local area connection doesn't have a valid ip configuration

[Ben Hutchinson]

I recently posted this on yahoo answers, but its been over a day and no replies so i came here to ask for help:

The edits are from yahoo, it's just a little extra info

I've had this problem for a few days now, for the last few months i have been using my school laptop to share internet to my main pc, the main pc has a very crappy wireless card and the reception is horrible. I had a virus a few days ago which i believe i have successfully removed, but after the virus was deleted my lan connection through the cable was disrupted and any attempts at fixing it using normal windows just gave me the 'LAN connection doesn't have a valid ip configuration' error. I've tried a fair few of the fixes online to no avail, when i tried using the ipconfig /renew fix i got another error 'An error occurred while renewing interface Local Area Connection : unable to contact your DHCP server. Request has timed out'.

I have both computers ipconfig /all data prepared, although i will only be posting the ethernet seciton due to character limits
School Laptop:
Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connection
Physical Address. . . . . . . . . : 2C-27-D7-80-23-B1
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::6d86:7b6c:3663:9702%11(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.151.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 237774807
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-16-CB-C6-50-2C-27-D7-80-23-B…
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

Home PC:
Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : B8-AC-6F-DD-07-9A
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::f102:5420:15fb:beff%11(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.190.255(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 246983791
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-15-6D-0C-FA-B8-AC-6F-DD-07-9…
DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
NetBIOS over Tcpip. . . . . . . . : Enabled

If you need any more information just ask and i will provide it
[h=2]Additional Details[/h]Edit: I have now restored my laptop to about 4 months ago, still getting the same problem... I am loathe to try restoring my main pc but if i don't get an answer soon i may have to
1 hour ago
Edit 2: I ended up restoring my main pc back till a time it was working, still the same problem...

 

[ChatGPT]

It seems like you are facing an issue with the LAN connection on your main PC after removing a virus. The error "LAN connection doesn't have a valid IP configuration" and "An error occurred while renewing interface Local Area Connection: unable to contact your DHCP server. Request has timed out" indicate a problem with obtaining a valid IP address from the DHCP server. Here are a few troubleshooting steps you can try to resolve this issue: 1. Check DHCP Service: - Make sure the DHCP service is running on your network. You can check this on your router or server. 2. Restart Router/Modem: - Sometimes, restarting your router or modem can resolve DHCP-related issues. 3. Release and Renew IP Address: - Open Command Prompt with administrative privileges and run the following commands:

 ipconfig /release ipconfig /renew

4. Static IP Configuration: - If DHCP is not working, you can try setting a static IP address on your main PC temporarily. Use an IP address within the same subnet as your school laptop but outside the DHCP range. Ensure to set the correct subnet mask and default gateway. 5. Check Network Cables: - Ensure that the Ethernet cable connecting your main PC to the network is undamaged and properly plugged in. 6. Update Network Drivers: - Update the network drivers on your main PC to the latest version. You mentioned having a "crappy wireless card," so ensuring that drivers are up-to-date can help with stability. 7. Run Network Troubleshooter: - Windows has a built-in network troubleshooter that can sometimes identify and fix common connectivity issues. Right-click on the network icon in the taskbar and select "Troubleshoot problems." If after trying these steps you still face the same issue, it might be beneficial to delve deeper into your network configuration or seek assistance from a professional if needed. If you provide any new updates or encounter any specific errors during these steps, feel free to share them for further assistance.