Did you just find a download or a file on your computer that is digitally signed by Vivox Inc.? If so, please read on.
You will probably notice Vivox Inc. when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screencap shows:

You can view additional details from the Vivox Inc. certificate with the following steps:
Here's a screenshot of a file that has been signed by Vivox Inc.:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This implies that the file has been published by Vivox Inc. and that no one has tampered with the file.
If you click the View Certificate button shown in the screencap 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, etc. You can also see the address for Vivox Inc., such as the street name, city and country.
Thawte Code Signing CA - G2 has issued the Vivox Inc. certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Vivox Inc. files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/54 | SLVoice.exe |
| 0/49 | QtSvg4.dll |
| 0/49 | phonon_ds94.dll |
The detection percentage is based on that I've collected 152 scan reports for the Vivox Inc. files. 0 of these scan reports came up with some sort of detection. You can review the full details of the scan reports by examining the files listed above.
The analysis is done on certificates with the following serial numbers: