Uninstall anti-virus software and disable firewall. Uninstall the driver and utility. When you reinstall, choose install the driver only. If it installed successfully, follow the above guide to...

What's the model number? How about status of powerline light? Did you pair them? http://www.tp-link.com/en/faq-258.html

With the latest firmware, the user interface is new... You can find WDS on Advanced---System Tools---System Parameters page. For detailed instruction, you may refer to user guide(page 95) for C2600....

Firmware is up to date? It might be a compatibility issue.

What's the hardware version of your 1043? Firmware is up to date?

Because it might stop proper communication between powerline adapters.