Dec 22, 2015

Trojan.Multi.CertStor.a Removal Guide

I got a trojan virus on my computer. It is called Trojan.Multi.CertStor.a that keeps popping up every few minutes. What do I do? How can i get rid of it? I’ve tried nortons and malwarebytes but both say they cannot remove it so any help would be appreciated.

Learn More About Trojan.Multi.CertStor.a:

Trojan.Multi.CertStor.a is categorized as Trojan horse that runs every time your system starts up because it can add malicious codes and its own start-up registry entries once downloaded. The virus usually gets into user’s computer from spam emails. It can be sent as a misleading letter from a known person or company. The content of the email tries to draw user’s attention to operate its attached file. Once you download the attachment, your system will be infected immediately. Website is another way to spread this Trojan. It can be hidden in porn sites or other illegal pages, pretending as helpful software to trick users into downloading it. This virus is able to affect the functioning of all Windows computers including Windows XP, Windows Vista, Windows 7, Windows 8 (8.1) and Windows 10. It aims to steal information on the infected computer and download or executes file from the Internet without any knowledge, therefore you should get rid of the virus quickly.

Trojan.Multi.CertStor.a virus can cause poor performance and windows freeze problem all the time while users are watching online videos or surfing the web. They may keep getting error messages like “Not responding” or “Stop working” when they work on the infected computer. In addition, the Trojan can change your browser settings and then harass you with endless pop-up or pop-under adverts for goods or services that you probably have little to no interest in during your online activities. You may not able to access your favorite website because your browser will redirect you to irrelevant pages randomly. Besides, the virus has the ability to monitor web-browsing activity of the user, capture confidential data stored on the computer and even steal your password, online credentials, or any desired data without any knowledge. You are suggested to remove Trojan.Multi.CertStor.a virus immediately.

The following instructions require certain levels of computer skills. If you’re not sure how to delete this nasty Trojan, please live chat with YooCare experts now.

Major characteristics of this nasty Trojan include:

Slow down your PC speed notably.
Add other dangerous Trojan or Spyware to your system secretly.
Allow the hacker to access your entire system.
Collect all your personal information and transfer to a remote hacker.
Destroy critical system files and make PC unstable.

How Does This Virus Get On Your Computer?

From malicious drive-by-download scripts from corrupted porn and shareware / freeware websites.
Through spam email attachments, media downloads and social networks.
When clicking suspicious pop-ups or malicious links.
Open unknown email or download media files that contain the activation code of the virus.

Note: No matter how the virus accesses your PC, users should know that there are no tools can remove this pesky Trojan automatically at this moment, it is suggested users not spend much time in downloading or paying any security software which claims can delete this stubborn virus. It is totally useless. To completely get rid of Trojan.Multi.CertStor.a Virus, professional manual guide is needed.

About Trojan Virus Removal:

Currently many computer users had the same experience that this virus couldn’t be removed by any anti-virus applications. So the manual approach is always required to combat this virus. And here is the step-by-step removal guide for all computer users.

1. End the malicious process from Task Manager.

Once Trojan.Multi.CertStor.a virus is installed, computer user may notice that CPU usage randomly jumps to 100 percent. At any time Windows always has many running processes. A process is an individual task that the computer runs. In general, the more processes, the more work the computer has to do and the slower it will run. If your system’s CPU spike is constant and remain at a constant 90-95%, users should check from Task Manager and see if there is a suspicious process occupying system resources and then end it immediately.

(The name of the virus process can be random.)

Press Ctrl+Shift+Esc to quickly bring up Task Manager Window:

task manager

2. Show hidden files and folders.

Open Folder Options by clicking the Start button, clicking Control Panel, clicking Appearance and Personalization, and then clicking Folder Options.

Click the View tab.

Under Advanced settings, click Show hidden files and folders, uncheck Hide protected operating system files (Recommended) and then click OK.

Folder Options

3. Open Registry entries. Find out the malicious files and entries and then delete all.

Attention: Always be sure to back up your PC before making any changes.

a. Press Windows key + R to open Run box. In the “Open” field, type “regedit” and click the “OK” button.


Then a Registry Editor window will pop up as the following picture shows:

registry editor

b. Search malicious files and registry entries and then remove all of them:

%AllUsersProfile%\Application Data\.exe

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\[random]
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Temp

Video Shows You How to Safely Modify Windows Registry Editor:

Trojan.Multi.CertStor.a is a highly dangerous Trojan that can sneak into vulnerable computers without any consent and carry out many harmful actions. There are a number of ways that you may end up with this Trojan horse on your PC. Usually the virus can infect a computer by opening malicious email attachments, visiting suspicious sites, or downloading unsafe software and programs. Once downloaded, the virus modifies your system settings, crashes down your computer and probably causes blue screen of death issue frequently to bother you. It even installs backdoor to the system secretly that gives hackers a great way to put additional viruses or software onto target computer and also steals your personal information such as credit card passwords, log in details, user credentials and others for their own illicit purpose. In most cases, Trojan.Multi.CertStor.a can disable security tools because its components are hidden in the deep of the system. Therefore, it is highly recommended users delete this Trojan manually.

Note: If you are not knowledgeable enough to be able to distinguish the location of this virus, or you are afraid of making mistake during the manual removal, please contact experts from Yoocare Online Tech Support for further help.

Published by & last updated on December 22, 2015 2:20 am

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