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

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: 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.