Full Control Deny by Mistake


New Member

I'm using Windows 7 Ultimate

I was trying to create user account which could only print via network.
When I finished with parental control settings, I wanted to restrict some files and folders on my c: drive and by mistake highlighted "Full Control = Deny" (Computer>c:>properties>Security>Edit>Users).
And now I can't even download anything, nor access anything, tried CACLS, restored system from Win 7 DVD (not helped). Access Is Denied error comes out everywhere!
I can't reinstall win 7, there too many data that will be lost.

Please give me some solution!