Access Denied! On Administrator Account?

[Moldavan]

So Im using Windows 7 and I made an account for my nephew so he can use without nagging me about entering in a password. But I wanted to make it so that he cannot download anything or edit any files on the C: Drive without a admin password.

Long story Short, I changed the security settings on C: so that it will not allow anyone who is not Admin to acces any files in the C: folder. My problem is that it locked everyone (Everyone!) out of C: ... Any UAC settings or account settings cant be done. My account is an admin and anytime it try to acces anything or run anything as administrator, It says Access Denied. (BTW I never get a prompt to put in an admin password).

Ok So I went on safe mode and made it so that the Built in admin would show and I logged on it. I opened an elevated cmd and tried to change the uac settings.. but all I get is an ACESS DENIED!! I dont know what to do and I do not want to have to reset the whole computer

Also: I cannot use system restore because it says acess denied.

 

[logicearth]

Well of course you are locked out you are part of the same group that you changed. You broke your computer attempting to do something you do not understand. You are going have to reinstall.

Now...get this. You CANNOT lock out people from accessing the system drive. If the user cannot access and read files from the system drive they cannot login. I don't know what you were trying to do but it was going to fail from the start.