Which windows is it ? win 10 ?
and where did you put your files?
troubleshoot -> reset my PC -> keep my files
but some times some files located in APPS folders gets deleted so I cant guarantee all your files will be there after repair.
If you have a desktop pc , you can take out the notebook harddisk , install it in your desktop , copy all your files , then you can make a clean new fresh install of windows if you dont want the repair route.
there is also safe mode step by step repair but it is too lengthy to write here.