Did you just find a download or a file on your computer that is digitally signed by NADEO? If so, please read on.
You'll typically see NADEO when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can also view the NADEO certificate with the following steps:
Here's a screenshot of a file signed by NADEO:

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 NADEO and that no one has tampered with the file.
If you click the View Certificate button shown in the screencap 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, etc. You can also view the address for NADEO, such as the street name, city and country.
thawte SHA256 Code Signing CA has issued the NADEO certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the NADEO files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the NADEO files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by NADEO.
| Detection Ratio | File Name |
|---|---|
| Not available | ManiaPlanet.exe |
The analysis is done on certificates with the following serial numbers: