Did you just stumble upon a file that has been digitally signed by David Harris? If so, please read on.
You will probably notice David Harris 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 David Harris with the following procedure:
Here is a screenshot of a file that has been digitally signed by David Harris:

As you can see in the screenshot above, the Windows OS states that "This digital signature is OK". This means that the file has been published by David Harris and that no one has tampered with the file.
If you click the View Certificate button shown in the screengrab 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 examine the address for David Harris, such as the street name, city and country.
COMODO Code Signing CA 2 has issued the David Harris certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the David Harris files I have gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the David Harris files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by David Harris.
| Detection Ratio | File Name |
|---|---|
| Not available | winpm-32.exe |
| Not available | Pegasus - w32-472.exe |
The analysis is based on certificates with the following serial numbers: