permission messed up

I accidently changed the permission for my
hard drive on Windows 7 . I have C: \ and D :\
but after I altered the permisson of my D :\ ,
now the access is denied .
In the drive Properties under the Security tab, I
ticked all the Deny boxes of the permission
settings .
I think the administrator was denied too . Now
when I check the drive Properties , there is no
Security tab. How can I change back the
permission as all my documents are in it .
Access are denied completely and I need help .
Please reply with suggestions n guides. Thank you!

i'm not sure if this will help you or not but did you try restoring your system to before you changed the permissions?

scrooge