Im also having exact same issue with this!! after I reinstalled my OS. My D-link DFE-520TX was no longer working.
Troubleshooting that i tried:
1. Tried to use different port for D-link DFE-520TX.
2. Tried to uninstall and re-install the driver
3. Tried to use different drivers for it but still no go.
4. Restarted my computer each time I do any changes.
If you have anything in mind please give us a feedback!! thank you!
