Did you just find a download or a file on your computer that has been digitally signed by majorcoresystem? Some of the security products refers to the detected files as FileRepMetagen [Adw] and PUP/Win32.AutoDefend.R98116. The detection rate for the majorcoresystem files collected here is 9%. Please read on for more details.
You'll probably see majorcoresystem when 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 majorcoresystem certificate with the following procedure:
Here's a screenshot of a file digitally signed by majorcoresystem:

As you can see in the screengrab above, Windows states that "This digital signature is OK". This means that the file has been published by majorcoresystem and that the file has not been tampered with.
If you click the View Certificate button shown in the screengrab 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, and so on. You can also view the address for majorcoresystem, such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the majorcoresystem certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screencap above.
These are the majorcoresystem files I have gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 6/68 | AutoDefend_Delete.exe |
Here is the detection names for the majorcoresystem files. I have grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AVG | FileRepMetagen [Adw] |
| AhnLab-V3 | PUP/Win32.AutoDefend.R98116 |
| Antiy-AVL | GrayWare[Downloader]/Win32.Adload.gen |
| DrWeb | Trojan.Adkor.724 |
| Rising | Trojan.Win32.Generic.128086EE (C64:YzY0OgUYMj9m1Nz1) |
| Zillya | Trojan.VirusCureCRTD.Win32.9559 |
The detection percentage is based on the fact that I've collected 68 scan results for the majorcoresystem files. 6 of these scan results came up with some sort of detection. If you like, you can review the full details of the scan results by examining the files listed above.
The analysis has been done on certificates with the following serial numbers: