Did you just run into a file that has been digitally signed by MusicNet, Inc.? If that's the case, please read on.
You will probably see MusicNet, Inc. when double-clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for MusicNet, Inc. with the following steps:
Here's a screengrab of a file digitally signed by MusicNet, Inc.:

As you can see in the screencap above, the Windows OS reports that "This digital signature is OK". This implies that the file has been published by MusicNet, Inc. and that the file has not been tampered with.
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 MusicNet, Inc., such as the street name, city and country.
VeriSign Class 3 Code Signing 2004 CA has issued the MusicNet, Inc. 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 MusicNet, Inc. files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/47 | WMHelper.dll |
The detection percentage is based on that I've collected 47 scan results for the MusicNet, Inc. files. 0 of these scan results came up with some sort of detection. If you like, 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: