“Oh God, last night, my computer came out a virus. My AVG showed me a warning that there is a virus called Trojan:Win64/Sirefef.U in my computer system. What do I do to drive it away?” Are you stuck in the same mire of that? Please read the article below:

Overview of Trojan: Sirefef.U

As its name implies, Trojan:Win64/Sirefef.U is ranged as a Trojan dropper. It installs a covert back door to implement its vicious aggression to your computer. But it’s a much powerful one in those notorious Trojan virus.  It can direct many malicious sites to you such as porn links or online shopping sites. This malicious Trojan horse is designed by cyber criminals to attack your PC and activate many malicious activities on purpose until your computer is wholly crashed.

If what must be mentioned first, the most noticeable feature of this Trojan virus must be its tremendous destructive and concealment that almost no antivirus can detect it. Even if the antivirus has detected it, it can’t be removed by the antivirus whatever effort you try. The second feature is its persistent and continually enhancing it’s power of damage to your computer. From the time you get caught by such virus, Trojan:Win64/Sirefef.U keeps bringing in lots of other unknown malware or virus. These virus are even more fierce than Trojan:Win64/Sirefef.U itself. They exhaust all RAM and CPU room which will make your computer more and more slow. In this situation, you will find that even if you just open one or two programs. The RAM and CPU are almost occupied 100%. What’s worse, it seems you computer system always occurs error here and there. The last feature you may never notice is that you may be exposed to hijackers who release those virus to your computer. That is to say, your personal information will be revealed to them and it will lead to casualty or property loss.

This virus is very small so it’s easy for Trojan:Win64/Sirefef.U spreading widely. It’s a parasite on sites, links, files and some computer devices. Accidentally, you will touch the infected links, sites or files, Trojan:Win64/Sirefef.U will grasp this chance to access into your computer. To invade your computer, the first thing it has to do is to take your antivirus into camp. This is also the key step for it to obtain more authority to control your computer. After that, it has successfully infected your computer.

To make your computer healthy, Live Chat with YooSecurity Expert Now, or you can follow the manual removal guide below to get your problem fixed. (For advanced computer users)

Key sentences to judge if your computer has been infected the virus

A. Your computer is something not normal as usual such as running very slowly.
B. When you open the Task Manager, you can find some strange progress which you never found before.
C. Some of your computer functions are unavailable or some normal legal program can’t run or there are unusual conditions of them.
D. It always constantly happens that your system has errors somewhere.
E. Lately, your computer system will be totally destroyed.

Best Way to Remove Trojan:Win64 & Manual Removal Step by Step?
Step 1: Press CTRL+ALT+DEL or CTRL+SHIFT+ESC. Open the Windows Task Manager.
If that didn’t work, try another way. Press the Start button and click on the Run option. This will start the Run tool. Type in taskmgr and press OK. This should start the Windows Task Manager

Step 2: Within the Windows Task Manager click on the Processes tab. Find the process by name. random.exe. Then scroll the list to find required process. Select it with your mouse or keyboard and click on the End Process button. This will kill the process.

Step 3: Delete malicious registry entries.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\random
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\run\Win64/Sirefef.U

Step 4?Remove malicious files of Trojan:Win64/Sirefef.U

C:\WINDOWS\assembly\GAC\Desktop.ini
C:\WINDOWS\system32\ping.exe

Video of Key Steps on How to Modify or Change Windows Registry:

Based on various situations and computer skills, you can choose the following solutions fit for you.
1. Follow the steps we provide to manually remove the virus.
2. If you failed to remove Trojan:Win64/Sirefef.U Infection with the method above, please consult YooSecurity certified professionals to remove it completely.

Published by Leo R. Oscar & last updated on June 4, 2013 8:47 pm

2 Responses to “How to remove Trojan:Win64/Sirefef.U from my computer?”

  1. Carisa Kinkin says:

    I’ve always been a bit nervous about editing the registry on my Windows Vista laptop to clear out records associated with viruses and spyware. It would be good to locate an automated software that can remove the records from the registry on auto-pilot. Any tips?

  2. Doris Kleinknecht says:

    Your post has been very pleasant and enjoyable. Thank you for writing. I will not fail to watch your website.

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