All new to me what location are you trying to download the DNG convertor from?
When I go into Home/Downloads/Adobe Camera Raw and DNG Converter and choose a DNG Converter to download, in this case 8.3, I get take to a page which states that This Webpage is not available.
The address of the page is http://download.adobe.com/pub/adobe/dng/win/DNGConverter_8_3.exe
I have tried a few other DNG Converter versions and get the same thing.
It looks like a server is down or something.
Hope this helps in identifying the issue.
All new to me you may want to check the DNS settings on your computer or router. I would recommend utilizing the DNS settings provided by the ISP.
I was able to resolve the download address and begin the download successfully. It is likely that whatever DNS is being utilized is not being updated properly.
If you are already using your ISPs DNS then you may want to locate a credible public DNS to see if you experience the same results.
Jeff, it may have been your midas touch or else my computer is playing the old tricks on me again but I just tried it again and it is currently downloading the converter as I type.
Thanks for your time on this and looking forward to using the convertor.