Did you just run into a download or a file on your computer that has been digitally signed by ARH Inc.? If so, please read on.
You will typically notice ARH Inc. when running the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view additional details from the ARH Inc. certificate with the following procedure:
Here is a screenshot of a file signed by ARH Inc.:

As you can see in the screengrab above, Windows reports that "This digital signature is OK". This means that the file has been published by ARH Inc. and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot above, you can see 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 ARH Inc., such as the street name, city and country.
VeriSign Class 3 Code Signing 2009-2 CA has issued the ARH Inc. certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the ARH Inc. files I have gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/51 | gxsd.sys |
The detection percentage is based on the fact that I have gathered 51 scan results for the ARH Inc. files. 0 of these scan results came up with some sort of detection. If you like, you can review the full details of the scan reports by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: