If you are using windows, the only way is to use an older version of windows, type windows 7. I upgraded using windows 7 on an old notebook.

I will do that, soon I return with news. UPDATE: It didn't work creating another account. I had to use an old computer with Windows 7 Sp1 to run the update program. Now my DECO M9 Plus is updated.

Yes, I tested it with windows 8 and windows 7 I tried with virtual machine, I used the compatibility of other versions, I don't know what to do anymore.

@Saurabh_S I've done this 3 times and it doesn't work.

But I can't log in to the update program.

I have this same problem, windows 10 Pro 64bits Ver. 2004. I used a virtual machine to test, but I can't access the application for windows. I live in Brazil, but I bought the device in the USA. Deco...