Did you just find a download or a file on your computer that is digitally signed by TangySoft Ltd.? If so, please read on.
You'll typically see TangySoft Ltd. when running the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for TangySoft Ltd. with the following procedure:
Here's a screenshot of a file digitally signed by TangySoft Ltd.:

As you can see in the screencap above, the Windows OS reports that "This digital signature is OK". This means that the file has been published by TangySoft Ltd. and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can view 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 view the address for TangySoft Ltd., such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the TangySoft Ltd. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screencap above.
These are the TangySoft Ltd. files I have gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the TangySoft Ltd. files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by TangySoft Ltd..
| Detection Ratio | File Name |
|---|---|
| Not available | 10starmovies_client_433868f.exe |
The analysis has been done on certificates with the following serial numbers: