Take file ownership.

[Alain]

How to take ownership of a file
Note You must be logged on to the computer with an
account that has administrative credentials.

To take ownership of a file, follow these steps:
Right-click the file that you want to take ownership of,
and then click Properties.
Click the Security tab, and then click OK on the Security
message (if one appears).
Click Advanced, and then click the Owner tab.
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 change the permissions on the files and
folders under this folder, go to step 5.
Click Add.
In the Enter the object names to select (examples) list,
type the user or group account that you want to give
access to the file. For example, type Administrator.
Click OK.
In the Group or user names list, click the account that
you want, and then select the check boxes of the
permissions that you want to assign that user.
When you are finished assigning permissions, click OK

I CANNOT FIND THE SECURITY TAB IN THE PROPERTIES WINDOW.
WHAT SHOULD I DO?????

 

[Miha Pihler]

Again,

open Windows Explorer (not Internet Explorer) and click on Tools > Folder
Options > View > now scroll all the way down and remove the checkmark next
to "Use simple file sharing" and then click Apply.

You should now be able to see permission tab.

Mike

 

[Roger Abell]

or, in Home edition, this must be done in safe mode