Did you just stumble upon a download or a file on your computer that is digitally signed by Rovio Entertainment Ltd.? If so, please read on.
You will probably notice Rovio Entertainment Ltd. when running the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view additional details from the Rovio Entertainment Ltd. certificate with the following procedure:
Here is a screengrab of a file digitally signed by Rovio Entertainment Ltd.:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This means that the file has been published by Rovio Entertainment Ltd. and that no one has tampered with the file.
If you click the View Certificate button shown in the screengrab 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 Rovio Entertainment Ltd., such as the street name, city and country.
Go Daddy Secure Certification Authority has issued the Rovio Entertainment Ltd. certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screengrab above.
The following are the Rovio Entertainment Ltd. files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Rovio Entertainment Ltd. files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Rovio Entertainment Ltd..
| Detection Ratio | File Name |
|---|---|
| Not available | AngryBirdsSpaceInstaller_1.0.0.exe |
The analysis has been done on certificates with the following serial numbers: