System Defender is an add-on that can be useful for internet search for users who is eager to make some beneficial custom on-line. But these browser add-ons irritate computer owners with the pop-ups like all other bundled browser add-ons. If you did not install the extension or you repent that installed it, so you can look through this page fully and choose the method that will be effective to remove System Defender . If you want the fast effective solution for its removal this adware, so you are welcome to download the easy-to-use program from this website.

Automatically    Manually    From browsers

Download System Defender Removal Tool:

Main advantages of Spyhunter 4:

  • Deletes all component parts created by System Defender .
  • Is able to fix browser problems and protect browser settings.
  • Has System and Network Guards, so you can forget about viruses.

What is System Defender ?

Get rid of System Defender

System Defender is a program for browser that may be downloaded by a user, but it can be installed with a freeware as well. The program demonstrates multiple publicity information in the form of annoying pop-ups. Some users do not like its work or are astonished that it is installed at all. So, System Defender is the undesired browser add-ons that should be removed from thePC.

Methods of System Defender Removal

1. Install System Defender Removal Tool:

2. Delete System Defender from Control Panel:

Step 1. Click Start
Step 2. Click Control Panel
Step 3. Find and highlight the annoying program and select Uninstall

3. Uninstall System Defender manually:


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Remove System Defender in browsers

Uninstall System Defender from Firefox:

  1. Help=>Troubleshooting Information
  2. Reset Firefox
  3. Finish

Delete System Defender from IE:

  1. Run inetcpl.cpl
  2. Advanced=>Reset
  3. Delete Personal Settings=>Reset=>Close

Remove System Defender from Google Chrome:

  1. C:\Users\”your username”\AppData\Local\Google\Chrome\Application\User Data
  2. Rename Default folder to Default2
  3. Open Google Chrome

Get rid of System Defender in Opera:

  1. Do not open Opera
  2. Remove Profile and Cache folders in:
    • C:\Users\User_Name\AppData\Roaming\Opera Software\Opera Stable
    • C:\Users\User_Name\AppData\Local\Opera Software\Opera Stable
  3. Open Opera

Removal in Safari:

  1. Open your browser
  2. Settings->Reset Safari
  3. Reset

Is System Defender dangerous?

Every user should know that all the programs for browsers including System Defender , no matter if they are helpful, are the vulnerabilities for a browser where they are installed. The browser vendors release systematic updates, due to which the browser safety is perfect. The presence of any extension can make the attempt to defend the security of the browser infeasible. And, as a result, some online offenders are able to infect your PC or steal your sensible info. If you cannot imagine your computer without browser extensions, then I suggest to download add-ons from reliable software vendors only, probably it will help you to defend your computer. But you should realize that it is better not to have any extensions at all.

But if you still need to install one or another add-on so you should be ready that the program will get compliance to see your private information that you type on different websites and can give it to the third parties. You should know that to download a browser extension is like downloading an utility. Will you install an utility if you do not know its vendor? I think, no. So, you also should be careful downloading the browser add-on that you are going to install.

System Defender is a browser extension that brings trouble. Is there any warranty that the deals are 100% real? No doubt, no. So, you should not confide the ads and its conditions. Also you should not click the links of the demonstrated promotions since they can be malicious and so, as consequence, your system can be infected with a true computer threat on your computer.

System Defender Activity Statistics
Damage Level

(Potentially unwanted software)

Data Theft 46,2%
System Failure 0,001%
Manual Removal 16
Removal From Browsers 40,1%
Removal with Free Antivirus 45,2%
Removal with Spyhunter 98,8%
Infected computers (USA) 0,001%
Infected computers (Europe) 0,003%
Browser Infection Probability 54,2%
Is your computer infected with System Defender ?

System Defender like other adware software has some main symptoms that will help you to understand if your PC is infected with it or not. Here is the list of them:

  • Many ads and pop-ups shown by System Defender
  • Very sluggish PC
  • Antivirus program detects some viruses
  • Some changes in the browser (toolbars, homepage, search engine)
  • Search results are redirected
  • Presence of System Defender files, folders and registry entries

Manual and Automatic Removal Methods?

You should realize that manual removal instructions that uninstall System Defender from browsers are 100% safe and you can execute them not being afraid that you damage your computer. Also these instructions are very effective, so you will reach the aim and the extension will be deleted together will all its manifestations. It is an easy way of removal as well; it yields merely to the automatic way of removal. But occasionally, using this technique users are surprised that the PUP returns to the browser and they have to fulfill any other methods to remove it.

But the manual method that instruct you to delete the files and registry items is the most dangerous one. If you take chances to follow this way of removal, in this case you should retain only one simple rule: do not forget to do the backup of the registry. Also this removal should be performed just by the user that knows what and why he has to eliminate.If you will remove several folders or registry keys that do not inhere to System Defender , then your system will not load next time. Experienced users will not step off and can enjoy the power of this manual way of removal.

Automatic method is the method when a user downloads any removal tool to solve the problem. The method is the most secure and effective. It is also the easiest one. You should just download the antivirus program that has System Defender in its base of signatures. This removal way is more helpful because you will install the antispyware and antimalware scanner that will protect the computer from the future incoming threats.

Concerning the money that users may pay for the removal of the virus I should say that some removal techniques are absolutely free of charge, for example manual removal from browsers, manual professional removal (in the case if you will do it by yourselves), free antivirus program and the removal from Control Panel. But not all of them are equally effective. The information about the effectiveness of these uninstall techniques I describe in the table that is called ‘Removal methods statistics’ below. Speaking about the paid methods of virus removal, I should mention the Computer Repair Shop Service and paid Antivirus program.

These methods are the most efficient. In spite of the great difference in the price (Repair Shop service depends on the complexity of the problem and may cost up to $300, but paid antivirus costs up to $60) these removal techniques are almost equal in the effectiveness and in the results. I should also notice that paid antiviruses always has support service (sometimes free) that will remove the virus like in an expensive computer repair shop.

Removal methods statistics

Removal method Price Effectiveness Safety Needed Time
Computer Repair Shop $150-$240 +++ +++ up to 4 days
Paid Antivirus $35-70 +++ +++ up to 1 hour
$0 +/- +/- up to 3 hours
From Control Panel $0 +/- ++ up to 1 hour
Manual Removal (Professional) $0 + up to 4
Removal from browsers $0 +/- +/- up to 1 hour
The Best System Defender Removal Tool

Are you looking for the software that is able to uninstall System Defender absolutely? So I want to recommend you Spyhunter because it is the best System Defender Removal Tool and even more. The software detects and deletes all the unwanted browser add-ons and, also, will protect your system, eliminating all modern viruses.

Spyhunter is a program written by Enigma Software. It includes antispyware and antimalware options, thus there are no virus threats that cannot be deleted with the of it. Spyhunter has a regularly updated signature base that defends your computer from various zero-day viruses.

Then new version of Spyhunter not only modify its interface to more easy-to-use and pretty, yet this program does not conflict with other antivirus tools that you can download. Also this utility works faster and protects better.

Spyhunter gives real-time protection, has Integrated SpyHunter Compact OS that let to uninstall the most stubborn viruses and the reliable live technical support. Spyhunter is compatible with Windows 98/ME/NT/2000/XP/2003/Vista/Seven/8, it needs 256 MB of RAM, 75 MB of available hard disk space.

How to use Spyhunter

You are welcome to use the link on this article to download Spyhunter. Double-click that installer and execute the necessary steps. Set the language that is understandable for you. Fortunately Spyhunter has a lot of them, being useful and handy. But not only this fact makes Spyhunter very well-known all outdoors, but also its great capacity to guard users’ PC.

Being installed this program should be updated, ordinarily this procedure begins by itself, but if not, in that case you can do it. When the update release is installed, you should begin a Scan. You should remove the tick in the Quick Scan check box, if you want to scan your computer completely. But generally Quick scan is enough to define all the viruses and this tool use sparingly your time and effort.

When the scan is finished it is better to look into the list of computer infections and delete the ticks near the needed utilities that Shyhunter detect as viral or undesired programs. Then you can click Fix Threats. If you have already paid for the license, then the computer threats will be deleted. If not, then you you can do it right now.

How to protect Your Computer from System Defender and other viruses

I think this page was good for System Defender Removal. But to guard your system from different resembling programs for browsers and from all probable dangerous programs, then you can download any antimalware software. You can choose software that has a broadened signature base, everyday update release and real-time protection. Only the software of this sort can keep your PC safe and sound. It is better to scan your PC for malware at least once a week. Should have a broad base of signatures and regular releases of updates. The best antiviruses has real-time protection. It is the protection that can detect malware on your computer when it is just going to infect your computer.

Spyhunter conforms to all the enumerated functions. So, I think it can guard your computer better than any other and still it is able to create a real-time obstacle to all the zero-day computer threats. This easy-to-use program will scan your PC. It will detect all the viruses and even all the potentially undesirable programs. If you installed any useful program for your work, but Spyhunter reveals it as the unwanted software, but you are utterly positive that the utility cannot be malicious, so you can refer it to Exclusions and Spyhunter will not remove it and never will define it as a malicious object again. If you need to scan only separate file, then you are welcome to take advantage of Custom Scan feature. You can also use Process Guard or Registry Guard of this tool for your convenience.

I also want to provide you with some useful things that will protect your computer from System Defender and other viruses in the future:

  • Do not download any free of charge software from unknown creators. If you do not like to pay for applications, then you should be very attentive during the installation of the application. You should not overlook the checkbox (usually small letters) that is responsible for the installation of any other applications. You should uncheck this checkbox.
  • Do not open any malicious websites (porn, for adults, websites of unknown free software), they usually contain some worms or other variants of computer threats.
  • Do not use torrents or other sharing web services, because you can download virus instead of the wanted file.
  • Do not double-click email attachment from unknown people. It can be one of the computer dangers.
  • Install any antivirus software and scan your system at least once a week.

How to remove System Defender easily (Video)

About Author: Material provided by: Alesya Orlova

Instructions to remove System Defender