Did you just stumble upon a download or a file on your computer that has a digital signature from NEC Personal Computers, Ltd.? If that's the case, please read on.
You'll probably see NEC Personal Computers, Ltd. when running 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 NEC Personal Computers, Ltd. certificate with the following procedure:
Here's a screenshot of a file that has been signed by NEC Personal Computers, Ltd.:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This implies that the file has been published by NEC Personal Computers, Ltd. and that the file has not been tampered with.
If you click the View Certificate button shown in the screengrab 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 NEC Personal Computers, Ltd., such as the street name, city and country.
VeriSign Class 3 Code Signing 2010 CA has issued the NEC Personal Computers, Ltd. 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 NEC Personal Computers, Ltd. files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 1/51 | reservesu.exe |
| 0/51 | NECBTSVC.exe |
| 0/51 | ecomonsv.exe |
| 0/48 | wset_info.exe |
| 0/48 | DispSw.exe |
| 0/50 | necmfk.exe |
| 0/51 | PeakShiftNotifier.exe |
| 0/55 | EFSrvIF.DLL |
| 0/50 | NPSpeed.exe |
| 0/56 | WDCDC.exe |
| 0/51 | ImgLnch.exe |
Here is the detection names for the NEC Personal Computers, Ltd. files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| F-Prot | W32/Zbot.PM.gen!Eldorado |
The detection percentage is based on that I have gathered 725 scan reports for the NEC Personal Computers, Ltd. files. 1 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 done on certificates with the following serial numbers: