El Capitan system preferences grayed out

Hi, I had a MacBook Air (11 inch, early 2014) Version OS X El Capitan 10.11.2. About a month or two before, my friend run pranked me and put a profile on my computer (the profiles that are in system preferences) and it grayed out some of my preference (Extensions, network, share, and profiles). I tried to remove him, but he repeated to me that he does not know how. I tried to do the thing when you hit NSPrefPaneGroups.xml, but because I'm under El Capitan, I am not able to delete this file because it's a file system or something else. Is there a way to solve this? Help, please!

Because the computer has been manipulated by a person with unknown intentions, the only course of action is to delete the internal drive, reinstall OS X and only restore your documents from a backup. You then need to install any other software support original or fresh downloads. That's what I recommend.

If you just want to remove the malicious profile and take your chances that nothing else has been done, see below.

Back up all data before proceeding.

These must be run as administrator. If you have only one user account, you are the administrator.

Please triple - click anywhere in the line below on this page to select:

sudo profile -d

Copy the selected text in the Clipboard by pressing Control-C key combination.

Launch the Terminal application integrated in one of the following ways:

☞ Enter the first letters of his name in a Spotlight search. Select from the results (it should be at the top).

☞ In the Finder, select go utilities ▹ of menu bar or press the combination of keys shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

Paste in the Terminal window by pressing the command-V key combination. I tested these instructions only with the Safari browser. If you use another browser, you may need to press the return key after pasting.

You will be asked for your login password. Nothing displayed when you type. Type carefully, and then press return. If you do not have a password, you will need to configure one before you can run the command. You can get a warning to be careful. Confirm. You don't need to display the warning.

If you see a message that your user name "is not in the sudoers file", then you have not logged as an administrator. Log in as one and start over.

Wait for a new line ending with a dollar sign ($) below what you entered. You can then quit Terminal. Test.

Tags: Mac OS & System Software

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