Trojan:JS/medfos.B Virus Removal – How to Remove

Are you troubled by Trojan:JS/medfos.B virus which constantly appears every 5 minute or so on Microsoft security essentials? It is really a pain that virus is in quarantine but it won’t stay removed and it keeps coming back into quarantine. How to remove it permanently? Follow this post and you’ll find out an effective way to remove it.

Trojan:JS/medfos.B Description:

Trojan:JS/medfos.B is a dangerous Trojan horse threat detected by Microsoft security essentials that may propagate through spam email attachments, malicious websites, unsafe downloads and many other ways. It tends to mess up the infected machine and notably slow down computer performance once it is downloaded.

After breaking into the target computer by exploiting software vulnerability, it can open a back door on the infected computer system and steal information from the victim without any awareness. It creates the specific registry entry so that it can launch automatically whenever you boot up Windows. Thus, you will receive annoying warning from Microsoft security essentials reporting the presence of this Trojan frequently. When this awful Trojan invades your computer, it may come with additional viruses and malware to damage your computer further. Sometimes, it may block your access to the Internet and redirect everything you do on your browser to malicious web pages. In a word, if you don’t want to witness the virus damages your whole system, you should remove it as soon as possible without a doubt.

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.

Trojan:JS/medfos.B can wreak chaos on your computer by performing the following actions:

1. It will steal confidential information such as user name and passwords without your permission.

2. It will download additional malicious files and update itself to prevent from the detection of antivirus program.

3. It can gather essential data like computer name, operating system version, network setup, and hardware/software details and send to remote hacker.

4. It will notably slow down your PC performance and make you experience blue screen of death, system crash down etc.

Manual Removal Guides:

1. 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.

2. 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 the “Start” button and then choose the option “Run”. In the “Open” field, type “regedit” and click the “OK” button.

b. All malicious files and registry entries that should be deleted:
%System%\[NAME OF AN EXISTING DLL]32.dll
%UserProfile%\Application Data\random.exe
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “[RANDOM].exe”

Video Shows You How to Safely Modify Windows Registry Editor:

As mentioned above, we can know Trojan:JS/medfos.B is a dangerous threat can put your computer in risky situation. Once you have this Trojan installed, It brings other types of threats to the affected computer including malware like FBI Antipiracy Warning virus, Internet Crime Complaint Center virus or adware parasites and spyware, in order to invade the computer deeply. If victims keep the Trojan horse in the affected computer too long, any unexpected damage may occur to the computer. Because it may lead damage to your hard drive and you will experience blue screen program or lots of unwanted errors or popups. Since this is a horrific threat to victims’ computers and it corrupts the affected computer seriously in many aspects, it is suggested users to remove Trojan:JS/medfos.B once upon detection.
If you have no idea how to do with that, you are welcome to contact experts from Yoocare Online Tech Support for further help.

Published by on November 17, 2012 6:05 am, last updated on December 27, 2013 9:58 am

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