Remove Malware Defense. Description and removal instructions
Title: Malware Defense
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Also known as: MalwareDefense
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Type: Spyware
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Severity scale: (73 / 100)
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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.

[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 Malware Defense.lnk, Malware Defense.lnk, Malware Defense Support.lnk, md.db, help.ico, Uninstall.exe, mdext.dll, mdefense.exe
Malware Defense properties: • Changes browser settings • Shows commercial adverts • Connects itself to the internet • Stays resident in background
Automatic Malware Defense removal:
remover for Malware Defense
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 Other programs to remove Malware Defense:• Malwarebytes Anti Malware - Review - Download • Malwarebytes Anti Malware - Review - Download • Windows Defender - Review - Download
Information added: 21/12/09
Information updated: 06/02/10
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Comments from visitors:
1. by
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
stuck at this point.
If something happens, I'll let you know....