Did you just run into a download or a file on your computer that has a digital signature from PC SPEEDUP TOOLS INC? Some of the security products refers to the detected files as W32.HfsAdware.5E71 and ApplicUnwnt.UnclassifiedMalware. The detection rate for the PC SPEEDUP TOOLS INC files collected here is 9%. Please read on for more details.
You will typically notice PC SPEEDUP TOOLS INC when clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view the digital signature details for PC SPEEDUP TOOLS INC with the following procedure:
Here is a screenshot of a file signed by PC SPEEDUP TOOLS INC:

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 PC SPEEDUP TOOLS INC 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 examine the address for PC SPEEDUP TOOLS INC, such as the street name, city and country.
COMODO RSA Code Signing CA has issued the PC SPEEDUP TOOLS INC certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the PC SPEEDUP TOOLS INC files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 6/65 | apc.exe |
Here is the detection names for the PC SPEEDUP TOOLS INC files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| Bkav | W32.HfsAdware.5E71 |
| Comodo | ApplicUnwnt.UnclassifiedMalware |
| DrWeb | Program.Unwanted.2144 |
| Endgame | malicious (moderate confidence) |
| Ikarus | PUA.MSIL.Advancedpccare |
| TrendMicro-HouseCall | Suspicious_GEN.F47V0901 |
The detection percentage is based on that I have collected 65 scan results for the PC SPEEDUP TOOLS INC files. 6 of these scan results came up with some sort of detection. 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: