Did you just find a file that has a digital signature from Andreas Spang? If so, please read on.
You will typically notice Andreas Spang when double-clicking to run the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for Andreas Spang with the following steps:
Here is a screenshot of a file that has been digitally signed by Andreas Spang:

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 Andreas Spang 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 see the address for Andreas Spang, such as the street name, city and country.
COMODO Code Signing CA 2 has issued the Andreas Spang certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screengrab above.
These are the Andreas Spang files I have gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Andreas Spang files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Andreas Spang.
| Detection Ratio | File Name |
|---|---|
| Not available | XTInstBasicDE947.exe |
The analysis has been done on certificates with the following serial numbers: