can't access local disk c drive access is denied

hi i can't access my c drive it's on local disk shows NTFS and if i click on it it pops up with access is denied can anyone help me please thanks my brother may look tomorrow but i just thought someone could help me as I have no idea what i have done might have to do with removing all security ownership.

i removed everything in the ownership section i think

if i click it it pops up with local disk c can't access access is denied

going to try with this video

remove security ownership can't access c drive - Bing video

i was trying to get rid of space

Did you create a restore point before trying?

no but i think I got my c drive back by following the video i posted

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i got it working