Did you just stumble upon a file that is digitally signed by schinagl.priv.at? If so, please read on.
You will probably notice schinagl.priv.at when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the schinagl.priv.at certificate with the following procedure:
Here is a screenshot of a file digitally signed by schinagl.priv.at:

As you can see in the screenshot above, the Windows OS states that "This digital signature is OK". This implies that the file has been published by schinagl.priv.at and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot 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, and so on. You can also examine the address for schinagl.priv.at, such as the street name, city and country.
Sectigo RSA Code Signing CA has issued the schinagl.priv.at certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screengrab above.
The following are the schinagl.priv.at files I have collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/63 | HardlinkShellExt.dll |
The detection percentage is based on that I have gathered 63 scan results for the schinagl.priv.at files. 0 of these scan reports came up with some sort of detection. If you like, you can view the full details of the scan results by examining the files listed above.
The analysis is based on certificates with the following serial numbers: