Did you just find a file that has a digital signature from Zango? If that's the case, please read on.
You will probably see Zango when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can also view the Zango certificate with the following steps:
Here's a screenshot of a file that has been signed by Zango:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This means that the file has been published by Zango and that no one has tampered with the file.
If you click the View Certificate button shown in the screenshot above, you can examine 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 Zango, such as the street name, city and country.
VeriSign Class 3 Code Signing 2004 CA has issued the Zango 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 Zango files I have collected, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Zango files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Zango.
| Detection Ratio | File Name |
|---|---|
| Not available | HostOE.dll |
The analysis has been done on certificates with the following serial numbers: