Is your computer infected with Trojan:Win32/Sirefef.AC? This step-by-step guide can help you safely and quickly remove Trojan:Win32/Sirefef.AC.

What is Trojan:Win32/Sirefef.AC? Trojan:Win32/Sirefef.AC analysis

Trojan:Win32/Sirefef.AC is detected and reported as dangerous Trojan virus like TrojanDownloader:win32/Unruy,H and TrojanDownloader:Win32/Seveto.A by Microsoft Security Essentials. Trojan:Win32/Sirefef.AC runs and carries out malicious actions in the background by copying itself to local drives and even messing up files, etc. Upon execution, when you access the google search for something, it sends you the links normally but when you enter for the first time in one of them, they redirect you for different sites. Worse still, Windows Firewall, Internet Connections Sharing or other system settings cannot open and you are given with an Error 10050: A socket operation encountered a dead network.

Trojan:Win32/Sirefef.AC as Damaging Trojan Virus by Impressions

  1. Trojan:Win32/Sirefef.AC reputation/rating online is terrible.
  2. Trojan:Win32/Sirefef.AC often enters your system secretly.
  3. Trojan:Win32/Sirefef.AC can make your computer perform slow and weird.
  4. Your Sophos may alert you to get rid of this infection Trojan:Win32/Sirefef.AC.

Remove Trojan:Win32/Sirefef.AC Manually Instructions

In order to get rid of Trojan:Win32/Sirefef.AC thoroughly from your infected machine, you need to end its related processes, search and remove associated registry values, DLL and then other relevant files.

1. The associated files of Trojan:Win32/Sirefef.AC to be deleted are listed below:

%Application Data%\{random characers}.exe

2. The registry entries of Trojan:Win32/Sirefef.AC that need to be removed are listed as follows:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\{random characers}.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\{random characers}.exe
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\{random characers}.exe
{malware filename}=%Aplication Data%\{malware filename}.exe
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer"NoDesktop" = '1'
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "[random].exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\[random numbers]
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = [random]

Remove Trojan:Win32/Sirefef.AC with Spyhunter:

1) Please click this download icon below to install Spyhunter.

2) Install Spyhunters Step by Step:


3) Run a scan with SpyHunter and remove all detected threats.

4) Remove reported threats.

Reminder: If you still have any other problem or question, we suggest you to download removal tool to remove it quickly and safely.

VN:F [1.9.18_1163]
Rating: 0.0/10 (0 votes cast)
Bookmark and Share

Get a Safer, Cleaner & Faster PC!

A good spyware remover can safeguard your computer at real-time automatically.

  • Terminate latest, stubborn virus/spyware
  • Safe, effective and complete
  • Fix various PC problems

So, pick one of your favorite to protect your system easily.

Malwarebytes Anti-Malware

Download | Review

Malwarebytes is one of the most popular and widely used anti-virus and malware-removal software applications for both home and corporate computer users alike.


Download | Review

SpyHunter is a powerful, real-time anti-spyware application designed to assist computer users in protecting their PC from trojans, rootkits and others.