Did you just find a file that has a digital signature from Telldus Technologies AB? If that's the case, please read on.
You'll probably notice Telldus Technologies AB when running the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for Telldus Technologies AB with the following procedure:
Here is a screenshot of a file that has been digitally signed by Telldus Technologies AB:

As you can see in the screenshot above, Windows states that "This digital signature is OK". This implies that the file has been published by Telldus Technologies AB and that no one has tampered with the file.
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, etc. You can also examine the address for Telldus Technologies AB, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the Telldus Technologies AB certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Telldus Technologies AB files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/69 | telldusservice.exe |
The detection percentage is based on the fact that I've gathered 69 scan results for the Telldus Technologies AB files. 0 of these scan reports came up with some sort of detection. 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: