Have you got a pop up from AVG saying the computer system is in danger because of Trojan:Win64/sirefef.AF virus? Why can’t your antivirus software remove this Trojan virus? Is it doing some bad stuff on your computer? How do you get rid of it instead of using more tools?

Trojan:Win64/sirefef.AF Virus Description

Trojan:Win64/sirefef.AF is categorized as one of the newly released Trojan serial viruses. It’s a member of the Win64/sirefef group. Different from other common Trojans, this newly released one is mainly focus on collecting information from PC users’ online activities and browsing histories and helping remote hackers take control of the infected PCs all over. With the ability to widely spread over the networks, this Trojan infection can infect computers from different areas. Even if there are antivirus programs installed on the computers, it can still sneak inside bypassing the antivirus protection.

A Trojan virus like this Trojan:Win64/sirefef.AF can be hidden within hacked web sites or links online; bundled with malicious programs or put in spam mail attachments. How does it infect your PC? Collecting information to help hackers benefit later on is the No.1 job. Other than that, this Win64/sirefef.AF Trojan can also weaken the protection of the system and extend the vulnerability so that more viruses and malware will be able to sneak inside to create more damage. Sooner or later you will experience other inappropriate activities on your computer which probably are caused by this Trojan. System stability and data storage will be threatened at the same time causing you to lose important and precious files and personal data. Knowing all these consequences, you’d better get rid of this Trojan:Win64/sirefef.AF virus as soon as possible!

What is the best way to get rid of this Trojan infection since antivirus programs have failed to remove it? Not familiar with any manual removal process? Contact YooSecurity Online PC Expert now to save your computer in time!

Steps on How to Get Rid of Win64/sirefef.AF Trojan Virus

Manual removal is suggested here in order to get rid of this Trojan:Win64/sirefef.AF virus. Here are some steps on how to get rid of this Trojan manually. Advanced PC skills are required if you are doing this on your own. Any small mistakes can lead to more serious problems. Thus, a backup of important data and files is also suggested before the manual removal process.

Step 1: Open Windows Task Manager to end processed related to [Trojan:Win64/sirefef.AF]. To do that, press Ctrl+Alt+Del keys at the same time or right click on bottom Task Bar and select Start Task Manager.

Step 2: Show hidden files. Go to Folder Options from Control Panel. Under View tab, select Show hidden files and folders and non-select Hide protected operating system files (Recommended) then click OK.

Step 3: Go to Registry Editor. First press Windows+R keys and then type regedit in Run box to search.Delete all the following or those related to the following filesand registry entries:

%AllUsersProfile%\Application Data\.dll
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System “DisableRegedit”
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\{rnd}=disable

Video on How to Modify or Change Windows Registry


Like many other Trojan viruses, Trojan:Win64/sirefef.AF infection is created by hackers in order to benefit from computer users’ personal information. It can help them record and collect valuable info and at the same time bring constant troubles to annoy PC owners to make them pay for things like fake Anti-virus programs, PC optimized tools and toolbars ect. Different from malware, redirect viruses and ransomware which are running visibly up on the infected computer screens, a Trojan normally runs in backdoor activities invisibly. Hence, you can’t just get rid of it like uninstalling an unwanted program in Control Panel. To stop your computer from suffering more, a complete Trojan removal is urgently needed. Otherwise, not only your computer will be damaged more, but your privacy could possibly be exposed up on the net. Among all the removal ways, manual removal is the most efficient and guaranteed way to help one get rid of this Trojan:Win64/sirefef.AF infection.

Note: Due to the fact that this Trojan:Win64/sirefef.AF virus can be changeable and hidden deep down the discs, you will need to check, define and delete files carefully during the manual removal. Contact Online PC Expert if you have failed to remove this Trojan by the above steps.

Published by Tony Shepherd & last updated on May 28, 2013 2:58 am

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