I was changing my security settings on my C: Drive and somehow it thought I clicked DENY... Now I can't open my Local C: Drive and somehow I lost my admin rights too. I tried enabling the secret Administrator, and it still says Access Denied. I also tried system restore, but it says I don't have any restore points. If I try installing Windows 10 will it help anything? Can I try to reinstall Windows 7, and not lose my personal files? Please somebody help me.