Did you just run into a file that has a digital signature from Guardware Ltd.? If so, please read on.
You will probably see Guardware Ltd. when double-clicking to run 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 Guardware Ltd. certificate with the following procedure:
Here's a screengrab of a file that has been signed by Guardware Ltd.:

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 Guardware Ltd. and that the file has not been tampered with.
If you click the View Certificate button shown in the screencap 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 view the address for Guardware Ltd., such as the street name, city and country.
Symantec Class 3 Extended Validation Code Signing CA - G2 has issued the Guardware Ltd. certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screengrab above.
The following are the Guardware Ltd. files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Guardware Ltd. files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Guardware Ltd..
| Detection Ratio | File Name |
|---|---|
| Not available | GWProxy.exe |
The analysis is based on certificates with the following serial numbers: