Did you just find a file that has been digitally signed by QuestSoft Corporation? If so, please read on.
You will typically notice QuestSoft Corporation when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the QuestSoft Corporation certificate with the following procedure:
Here's a screenshot of a file digitally signed by QuestSoft Corporation:

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 QuestSoft Corporation and that no one has tampered with the file.
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, etc. You can also view the address for QuestSoft Corporation, such as the street name, city and country.
COMODO RSA Code Signing CA and DigiCert SHA2 Assured ID Code Signing CA has issued the QuestSoft Corporation 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 QuestSoft Corporation files I have collected, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the QuestSoft Corporation files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by QuestSoft Corporation.
| Detection Ratio | File Name |
|---|---|
| Not available | HR2016INSTv8271.exe |
| Not available | QCRInstallv1175.exe |
The analysis is based on certificates with the following serial numbers: