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Malware Defense. How to Remove? (Uninstall Guide)

removal by - -   Also known as MalwareDefense | Type: Rogue Antispyware
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Malware Defense is a fake antivirus program from the same family as AntiMalware virus. Please read the removal instructions carefully and remove this infection from your computer as soon as possible. MalwareDefense is promoted through the use of Trojans, mostly Trojan.FakeAlert. Most of the time, Trojans come from fake online scanners, misleading websites or masquerading as a fake video codec. Please note that Trojans can come bundled with other illegitimate software. Once installed, Malware Defense will generate fake alerts or notifications and report false detections in order to convince you to purchase this bogus anti-virus software. Please don't purchase it. Otherwise, you will simply lose your money.

Malware Defense graphical user interface
[Figure 1. Malware Defense graphical user interface]

When running, Malware Defense will simulate a system scan and display a list of infections that can't be removed with a trial version of this program. In order to remove found infections you have to buy a full version of it. However, this is nothing more but a scam. Let's see why. First of all, MalwareDefense reports non-existing or legitimate Windows files as infections. Do not remove those files manually because you can seriously damage your computer. Some of the infections will be shown with the following names: Backdoor.Win32.Agent.ich, Rootkit.Win32.Agent.pp, Trojan.Dropper, Virus.Win32.Gpcode.ak, Email-Worm.Win32.NetSky.q, Net-Worm.Win32.Mytob.t and etc. Usually, Malware Defense detects those infections in main Windows OS directories. Of course, this malicious software detects the same infections on every infected computer.

While running, Malware Defense will also display fake security alerts, notifications and error messages. This is a part of MalwareDefense scam. This virus will block particular software and display fake warning that states:


There is unauthorized antivirus software detected on your computer. It is recommend you to remove it, otherwise it could conflict with Malware Defense. Press 'OK' to terminate [Program name]

Other fake security alerts will state that your computer is not protected and that Internet Explorer, Windows Messenger or other programs are infected. While browsing the web you will likely see fake warnings claiming that particular websites are dangerous and may harm your PC.

Malware Defense is not legitimate security software. It's a well-thought-out scam. If you fins that your computer is already infected, please use the manual removal guide stated below or download an automatic removal tool to remove Malware Defense from the system as soon as possible. Remember, do not purchase it. If you have already purchased this misleading program, contact your credit card company and dispute the charges. Related files: Uninstall.exe

Malware Defense properties:
• Changes browser settings
• Shows commercial adverts
• Connects itself to the internet
• Stays resident in background

It might be that we are affiliated with any of our recommended products. Full disclosure can be found in our Agreement of Use. By downloading any of provided Anti-spyware software you agree with our Privacy Policy and Agreement of Use.
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What to do if failed?
If you failed to remove infection using Reimage Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall Malware Defense. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.

More information about this program can be found in Reimage review.
Reimage is recommended to uninstall Malware Defense. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.

More information about this program can be found in Reimage review.
Not using OS X? Download a remover for Windows.
Press Mentions on Reimage
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Malware Defense manual removal

Kill processes:
mdefense.exe
uninstall.exe
Delete registry values:
HKEY_CLASSES_ROOT\*\shellex\ContextMenuHandlers\SimpleShlExt
HKEY_CLASSES_ROOT\CLSID\{5E2121EE-0300-11D4-8D3B-444553540000}
HKEY_CLASSES_ROOT\Folder\shellex\ContextMenuHandlers\SimpleShlExt
HKEY_LOCAL_MACHINE\SOFTWARE\Malware Defense
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "Malware Defense"
Unregister DLLs:
mdext.dll

Delete files:
mdefense.exe
mdext.dll
uninstall.exe
help.ico
md.db
Malware Defense Support.lnk
Malware Defense.lnk
Uninstall Malware Defense.lnk
Delete directories:
C:\Program Files\Malware Defense
%UserProfile%\Start Menu\Programs\Malware Defense

Geolocation of Malware Defense

Map reveals the prevalence of Malware Defense. Countries and regions that have been affected the most are: Spain, Italy, United States and Germany.

Information updated:

Comments on Malware Defense

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Martha
In the complicated world we live in, its good to find simple sloiutnos.
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<Guest>
Hey,
Just want to say thanks.
One point for anyone out there...If your system keeps telling you that the mdext.dll is "in use or read/write protected" just change the name of the file. that seems to break the code/macro text running in the background...
Peace,
G
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<Guest>
I tried what you said and seemed to work, but I was still getting the "out of nowhere" audio advertisements and the bug would prevent me from reaching this site or other sites that help you remove the virus.
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<Guest>
I finally deleted my windows folder and reinstalled windows and that got rid of it. Im not sure how i got it, if it was downloading a file or playing something on the web, any way thanks for you help
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<Guest>
I rebooted then the computer got stuck on the "Welcome" screen at the beginning. I would click to log in and instead it would make the sound of logging out. By far the smartest and toughest bug Ive seen.
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<Guest>
yea system restore was disabled for me too
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<Guest>
system restore is disabled and mdext.dll is nowhere to be found

stuck at this point.
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<Guest>
2010-01-15 21:01:29, hey, I tried what you said and it works! thanks alot dude
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<Guest>
Does any one know how to locate mdext.dll????
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<Guest>
System restore also deletes it. Just turn off your computer, then when you restart it press F8 repeatedly. Then Repair Computer. Then choose System Restore. You can restore it to an earlier date. Then when you log onto your account Malaware Defense is gone!
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