To take ownership of a file or folder

Take Ownership:
Are you not able to access or delete a file\folder from your computer even you are administrator?
Don’t worry; take ownership of that file or folder.

How to take ownership of a file
You must have ownership of a protected file in order to access it. If another user has restricted access and you are the computer administrator, you can access the file by taking ownership.

To take ownership of a file, follow these steps:
1. Right-click the file that you want to take ownership of, and then click Properties.
2. Click the Security tab, and then click OK on the Security message (if one appears).
3. Click Advanced, and then click the Owner tab.
4. In the Name list, click Administrator, or click the Administrators group, and then click OK.

The administrator or the administrators group now owns the file.
To take ownership of a folder, follow these steps:
1. Right-click the folder that you want to take ownership of, and then click Properties.
2. Click the Security tab, and then click OK on the Security message (if one appears).
3. Click Advanced, and then click the Owner tab.
4. In the Name list, click your user name, or click Administrator if you are logged in as Administrator, or click the Administrators group. If you want to take ownership of the contents of the folder, select the Replace owner on subcontainers and objects check box.
5. Click OK, and then click Yes when you receive the following message:
You do not have permission to read the contents of directory folder name. Do you want to replace the directory permissions with permissions granting you Full Control?
All permissions will be replaced if you click Yes.

Note folder name is the name of the folder that you want to take ownership of.
Click OK, and then reapply the permissions and security settings that you want for the folder and its contents.