Is your computer infected with Trojan:Win64/Sirefef.K Virus? No worries, you could try to implement the removal tutorial in this post or download automatic removal tool SpyHunter to help yourself out effectively.

Trojan:Win64/Sirefef.K Description

Trojan:Win64/Sirefef.K is a high Severe trojan horse which comes from the same code designed by hackers. Trojan:Win64/Sirefef.K is detected by the Microsoft Security Essentials and is determinated as high risk threat by TEE SUPPORT LAB. Many victioms of the virus said that MSE keeps popping up an alert notifying them that they were infected with Sirefef.k. When they click “Clean Computer”, and a few seconds it reports that it is “Clean”. A short while after, it pops up with the same message of the Sirefef.k in the same folder location as the previous alert. Trojan:Win64/Sirefef.K is nasty and infects yourwin 64 bit system especially in Windows 7 Ultimate. Trojan:Win64/Sirefef.K spreads very fast over the world and can be detected by Sophos anvirus, but Trojan:Win64/Sirefef.K virus removal tool won’t able to help. What Trojan:Win64/Sirefef.K symptoms can do is to mess up your files, slowdown your PC speed, change your browser settings etc. Trojan:Win64/Sirefef.K removal is really necessary.

Trojan:Win64/Sirefef.K Identified as Security Threat by Impressions

  1. Trojan:Win64/Sirefef.K reputation/ rating online is terrible.
  2. Trojan:Win64/Sirefef.K is installed/ run without your permission.
  3. The official website of Trojan:Win64/Sirefef.K is poorly built without contact info.
  4. The payments website of Trojan:Win64/Sirefef.K is suspicious & claims your OS is unsafe.
  5. Poor Performance like highly-consumed system resources is caused by Trojan:Win64/Sirefef.K.

Trojan:Win64/Sirefef.K Step-by-Step Removal Instructions


Plan A: Remove Trojan:Win64/Sirefef.K manually

Plan B: Remove Trojan:Win64/Sirefef.K automatically (with SpyHunter)


Plan A: Remove Trojan:Win64/Sirefef.K manually

1.To stop all Trojan:Win64/Sirefef.K processes, press CTRL+ALT+DELETE to open the Windows Task Manager.

2.Click on the “Processes” tab, search for Trojan:Win64/Sirefef.K, then right-click it and select “End Process” key.

3.Click “Start” button and selecting “Run.” Type “regedit” into the box and click “OK.”

4.Once the Registry Editor is open, search for the registry key “HKEY_LOCAL_MACHINE\Software\Trojan:Win64/Sirefef.K.” Right-click this registry key and select “Delete.”

5.Navigate to directory %PROGRAM_FILES%\Trojan:Win64/Sirefef.K and delete the infected files manually.

All associated file of Trojan:Win64/Sirefef.K:

%AllUsersProfile%\Application Data\.dll

%AllUsersProfile%\Application Data\.exe(looks like Trojan:Win64/Sirefef.K)

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “.exe”

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “Trojan:Win64/Sirefef.C”


HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run “Trojan:Win64/Sirefef.K”

(Note: If you haven’t sufficient expertise in dealing with program files, processes, .dll files and registry entries, it may lead to mistakes damaging your system. In this case, you could download SpyHunter for automatic and professional help.)

Plan B: Remove Trojan:Win64/Sirefef.K automatically (with SpyHunter)

1. Download removal tool SpyHunter

a) Click the icon below to download SpyHunter automatically.


b) Follow the instructions to install SpyHunter

spyhunter run

spyhunter setup

spyhunter setup

2. Run SpyHunter to fully scan your PC

Run SpyHunter and click “Malware Scan” button to scan your PC
spyhunter3 scan

3. Show the scan result and delete all detected items.

Hope the manual tips could assist you to exterminate Trojan:Win64/Sirefef.K completely! Should you have any problem on uninstalling Trojan:Win64/Sirefef.K, you are sincerely suggested to use the professional and automatic removal tool SpyHunter.

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