[urgent] Can't install windows nothing's working help needed!!

After installing remixOS

When I rebooted laptop:

It was not booting so I though I will repair still it says hard disk is locked.

So thought of installing windows 10 again:

Can't install windows too says no space

Only 400 MB left I I think it got reserved wtf what should I do I've data on hard drive which I need how should I get it

Here are the screenshots

http://i.imgur.com/ZDzgHnL.jpg http://i.imgur.com/JtqVvCw.jpg

Thanks a lot!!!