Did you just find a download or a file on your computer that has a digital signature from SGA Solutions Co.,Ltd.? If that's the case, please read on.
You'll probably notice SGA Solutions Co.,Ltd. when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can also view the SGA Solutions Co.,Ltd. certificate with the following procedure:
Here's a screengrab of a file digitally signed by SGA Solutions Co.,Ltd.:

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 SGA Solutions Co.,Ltd. and that the file has not been tampered with.
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, etc. You can also see the address for SGA Solutions Co.,Ltd., such as the street name, city and country.
GlobalSign Extended Validation CodeSigning CA - SHA256 - G3 has issued the SGA Solutions Co.,Ltd. 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 SGA Solutions Co.,Ltd. files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/67 | PWSLocalServer.exe |
The detection percentage is based on that I have gathered 67 scan reports for the SGA Solutions Co.,Ltd. files. 0 of these scan reports 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 has been done on certificates with the following serial numbers: