I recently got an SSD and made it my boot drive, it has windows and program files and etc. I noticed that my hard drive that used to be my boot drive was running out of space, when I checked it still has Windows, Program Files, and Program Files(x86), is it ok to delete these since the hard drive isn't my boot drive anymore? If it is alright to delete them I would also like to ask how to delete them, thank you very much in advance!