-of course, if you can, grab a flash drive and try to backup your windows installation just to be safe. idk which folders you care about but backing up C:\Users\<username> is usually a good idea. -go into Create and format hard disk partitions, you can find it from your start menu -find your main windows partition, it's the bigass one labeled C -right click and click resize, you should be able to shrink the volume, shrink it by as much as you feel like, though preferably at least 100GB -if you really want, you can also try to move the recovery partition back. im not going to explain how to do that though