What files are ok to delete from your windows c drive?

[BILL0905]

Hi,

Could someone tell me what files are ok to delete from my C Drive please? I know i need to keep some but i'm unsure which ones i need to keep.

 I need to install the one time Windows package as my old subscription has ended but it wont let me do anything as i only have 1.17gb left of 27.1gb on my windows C Drive.

[WAWood]

@BILL0905

Here are some things you can do to recover some of the disk space:
http://www.tenforums.com/tutorials/3012-disk-cleanup-open-use-windows-10-a.html
http://winaero.com/blog/how-to-clean-up-winsxs-folder-in-windows-10/

Also, the community Win10 Forums has the following suggestions:
https://www.tenforums.com/tutorials/83441-free-up-drive-space-windows-10-a.html