How to fix no app to open windows 10 folders

[jpod]

Hi pc Pros... My desktop... Cant open folders on desktop that contain word docs etc.... If i make new doc it opens...

Says there is no app set as a default to open folders....

I have googled and tried cmd as admin... Scan disk... Health... I am a noob. Tried restarting windows explorer, restart....
Any pro pointers would be appreciated... Please explain like I am 10

Can open cmd as admin... There endeth my prowness

 

[jpod]

I think it is a registry thing...

Start File exlorer doesnt work

I can open folders 'in another window' and see my files and work on them, print and copy them to usb!

I plan to back up, reinstall Windows. Any pointers appreciated