Did you just run into a file that has a digital signature from Datpol Janusz Siemienowicz? If that's the case, please read on.
You will probably notice Datpol Janusz Siemienowicz 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 additional details from the Datpol Janusz Siemienowicz certificate with the following steps:
Here is a screenshot of a file digitally signed by Datpol Janusz Siemienowicz:

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 Datpol Janusz Siemienowicz and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can examine 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 Datpol Janusz Siemienowicz, such as the street name, city and country.
GlobalSign CodeSigning CA - G2, GlobalSign ObjectSign CA and GlobalSign CodeSigning CA - G3 has issued the Datpol Janusz Siemienowicz certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Datpol Janusz Siemienowicz files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/54 | spyshelter.sys |
| 0/40 | spyshelter.sys |
| 0/57 | SpyShelterSrv.exe |
The detection percentage is based on that I have gathered 262 scan reports for the Datpol Janusz Siemienowicz 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 results by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: