Download the OpenWRT firmware for the C7 V2 EU.
Rename it to ArcherC7v2_tp_recovery.bin and place it in the same folder as TFTPD32.
Open your network settings in Windows and select the wired adapter (don't try this on a wireless connection.
Right-click and select Properties.
Select Internet Protocol Version 4 (TCP/IPv4) and click on the Properties button.
In the General tab, select the radio button for Use the Following IP Address.
Enter 192.168.0.66 for the IP address.
Should default to 255.255.255.0 for the Subnet Mask.
Turn the router off.
Make sure nothing else is connected to the router, it should be just the router and your computer.
Open TFTPD32. You may be asked to allow it through the firewall. Select Public.
Make sure the Current Directory dropdown is showing the path to the TFTPD32 folder, which should also contain your recovery firmware file ArcherC7v2_tp_recovery.bin
Select 192.168.0.66 in the Server Interface dropdown.
Go to the router and press the power button and the reset button at the same time.
Continue to hold the reset button for about 4 or 5 seconds, then release.
You should see a progress bar going across the TFTPD32 screen (although it should only take a very short time.)
View the log. It should show 100% transferred.
Go back to your wired network adapter, and change the radio button back to Obtain an IP Address Automatically.
Try to access the router GUI.
If you can see that you have Internet access in the Network icon, but can't access the GUI, open a Command prompt and run ipconfig /release and then ipconfig /renew.
Try to access the GUI again.
