After installed windows 10 in my machine, almost every time i start than, before the Welcome Screen my windows hangs in a black screen for 20-30 seconds, with the CPU and SSD doing nothing. This happens most when I start the PC, when I just restart this problem happens less.
I contacted the Microsoft support, a tech connect in my PC and did some things like a /SFC command, disable all services thats is not from Microsoft, but nothing this fix the problem.
Before I am using Windows 8.1 and never had this type of problem.

I am attaching a DX Log for you cam see my hardware. This installation is a clean one, its not a upgrade from 8.1.
So if someone can help me I am really thankful :) and sorry my bad English.