Windows 10: Windows 10 wont install

Hi Guys,
New here first post, I was asked to build two mid range gaming pc's for some friends of mine, as I've build many in the past, my issue is,
Installing a Retail copy of windows 10 64 bit (USB). I cant get it to install at all been at it 4 hours, installing onto a New WD Black drive, it gets so far sometimes the second stage gets to around 25-30% and crashes with various errors, or sometimes just loops back and starts all over again...
Errors seems to be driver related, ie system thread exception not handled, or violation errors, memory management, and a few others, I know I installing the motherboard drivers, and latest graphics drivers would solve most of the issues, But cant do that until Windows is installed and activated..
I have swapped out memory, tried in various lanes, put only one stick in, swapped out graphics card...made no difference,
mother board is fine as is power supply.... Just cant install windows, and no point building the other machine till this ones sorted..
Any help would be great...

:)

 

installing windows10

have windows 7 and trying to install windows 10 for free and it downloads but wont upload. entered my product key and rechecked it a few times and that is right. but it just wont install

 

another installation?

I try to update AVG, 10 wont allow that, says another installation in process. Also computer/services/windows installer wont let me make changes to it.

 

Try the other CPU and make sure Bios is latest perhaps....... I have seen issues with AMD and INTEL CPU's lately.....

KB