Thankyou for this explanation Fafhrd. Very informative, I didn't know the half of what you have explained and it is very enlightening! Not sure how to do a tutorial yet, but in the mean time, see...

Hope this is useful to someone out there as my XPS one was toasted by Windows 10 and black screen booted like others on here, and it didn't happen straight away, used win10 for a few weeks before it...