I used the upgrade windows button on Microsoft site.. redownloaded the installer for windows 10 and used that to install... it kept everything where it was so luckily I don't need to readd desktop shortcuts and my steam folder etc 900 gb of games now... That has fixed the issues thank the gods. Just sucked waiting almost 4 hours to finish.
Also I finally got my hands on an external - Seagate backup plus. 5tb external HD so may move my steam folder there to free up the 900gbs which may of also added to my issue.