Surface Pro 3 512 GB
Surface Pro 3 Docking Station
Windows 8.1 Pro

Logged in as an administrator.

I am trying to create a file in C:\Program Files\Windows Defender

When I right click in the folder and select new the only option is Folder.  If I try to copy and past a file it says the source file is not longer available.  If I open the source file in Notepad and try and save it in C:\Program Files\Windows Defender it says:

C:\Program Files\Windows Defender\<file name>
File not found.
Check the file name and try again again.

What is the problem?

The security settings for the folder are:

• Edited by saberman_Plus_1 Monday, July 27, 2015 1:40 AM Typo

Hi,

This behavior is designed by default since it's the built-in program and system folders.

And you can see that the files in this folder are marked as read only. If you uncheck the read-only box, you can create text files or others besides Folder:

The files are marked as read only but the folder is not.  As an administrator I have rights to create files in the folder but the system won't let me.

I did try to uncheck the Read-only box running as an administrator and the system would not let me.

I also tried setting up a tast in the scheduler running under the system id to copy the file into the folder and ran it.  It failed the same way as when I tried to use copy in an administrator cmd window.

There is something else protecting the folder.

Another week has passed and still no answer.  Security by obscurity is not an effective method.  What is securing this folder?