C drive access denied

[Suchit]

i am not able to open my c drive.. even if i log in as admin i am not able to access c drive.
i changed permissions for c drive yesterday so that the guests cant access the drive.. but now even i am not able to access it.
i have tried to change the permissions but whenever i click the advanced permissions tab it also shows the same thing.. access is denied. i have tried system restore but that too doesn't work... i even tried cmd. but that too doesnt work

[Geek-9pm]

Restart in Safe mode.
Log in as administrator.

[Suchit]

i tried that... not working..

[Linux711]

you can open cmd and try the cacls and takeown commands

here is some more info: http://superuser.com/questions/191800/how-to-grant-access-to-a-folder-using-cacls

and of course there is plenty on google.

[justintjacob]

Are you tried to change the ownership and check ?