Did you just run into a download or a file on your computer that has been digitally signed by Total Defense, LLC? If so, please read on.
You will probably see Total Defense, LLC when double-clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for Total Defense, LLC with the following procedure:
Here's a screencap of a file signed by Total Defense, LLC:

As you can see in the screengrab above, Windows reports that "This digital signature is OK". This implies that the file has been published by Total Defense, LLC and that the file has not been tampered with.
If you click the View Certificate button shown in the screencap above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also see the address for Total Defense, LLC, such as the street name, city and country.
DigiCert SHA2 Assured ID Code Signing CA has issued the Total Defense, LLC certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Total Defense, LLC files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/70 | AMRT.exe |
| 0/68 | amrtmgr.exe |
| 0/67 | Tray.exe |
The detection percentage is based on the fact that I have gathered 205 scan reports for the Total Defense, LLC files. 0 of these scan reports came up with some sort of detection. You can review the full details of the scan results by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: