WF-3640 WIC Firmware Downgrade Not Working

[WF-3640 WIC Firmware Downgrade Not Working]

Thanks for the reply.  There is no firmware for WF-3640 at Chipless Solutions.  Could you post it there, please?

[WF-3640 WIC Firmware Downgrade Not Working]

I bought a firmware flash key this morning.  To my suprise, the Epson firmware can't be flushed.

Do you guys know what is the problem?  The WIC behaves like usual: download, install, then says the firmware is uploaded.

The printer will think for a while, then display this "ROM is not writable".  

 

 

[WF-2750 Cannot See the Printer]

Just for a few non-tech-savvy folks out there: how do you remove a virtual printing USB port?  

[WF-2750 Cannot See the Printer]

Hi Brad,

I was able to solve the problem with another laptop (like your solution). 
For this problem computer, it is the second time that I licensed a printer.  However, this printer is used for refurbishing printers, so it has been connected to many printers (100+).

It is running Windows 8.  I hope this information will help someone to find a solution.

[WF-2750 Cannot See the Printer]

I thought about the USB cable, so I changed 3 different cables.  Neither of them works.  

Also, I can see my Artisan 1400 if I plugin the Artisan instead of WF-2750, so it's not a faulty USB.

I bought this WF-2750 recently, is it possible that the software doesn't work for newer printers?

[WF-2750 Cannot See the Printer]

I updated the firmware without a problem.  Please see the first photo.  However, when I fire up the license.exe, I can't see the printer on the USB connection.  The printer selection list is all blank.  

I've already paid for a key but can't use it.  I am in the USA.