Access Denied message and empty disk after changing settings

I really messed up my computer. In an effort to keep others from accessing my files, I have now blocked myself. I know now that I never should have changed anything, but I need to see if there is a way to correct it. Here is what happened.

I have two partitions on my hard drive c: where I keep my program files, and d: where I keep all my other files that I create. I went to the properties folder on d: and changed the "authenticated users" to "deny" all access so that someone visiting could not access my documents. It warned me that by doing so a person with dual access would no longer have access. As the administrator, I didn't think it would affect my access so I said ok. Then when I could no longer access the files, I did a system restore to two weeks prior to my changing this. The computer re-booted to the designated area, but when I went to access d: I'm still getting the access denied message. Furthermore, the disk appears to be empty. When I go to the diskmgmt run command, it says 100% free. Where did my files go? I have a backup but unfortunately, it is not a recent one and I can't even use it because I am still denied access. What do I do? Please help.

I was able to fix the problem and all files have re-appeared!