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Remove eFast Browser Virus From Chrome/Firefox/IE

Parasite may reinstall itself multiple times if you don't delete its core files. We recommend downloading SpyHunter to scan for malicious programs installed with it. This may save you hours and cut down your time to about 15 minutes. 

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More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

This article aims to help users remove eFast Browser from Chrome, Firefox, Internet Explorer and Safari, as well as their respective system. Dozens of pleads to eFast Browser 見分け方 have been released on our contacts form, signifying this virus infects Japanese users primarily.

efast browser 見分け方, as asked by users

You’ll find trace of eFast Browser in your control panel.

If you are seeing a sudden increase in advertisements displayed on your screen including the existence of Ads where previously were none the likely case is the existence of an Ads-based malware on your computer (called Adware). eFast Browser is one such type of Adware and it is the likely cause behind the Ads.

Adware commonly exist as Add-ons for Chrome, Mozilla Firefox and Internet Explorer. Their goal is to display Ads on your screen in order to generate revenue for the creators and distributors of the adware. Unfortunately these programs are also known to install other malicious applications on computers that are infected by them – commonly Adware, Bloatware, Trojans and sometimes even viruses, so please try to uninstall eFast Browser as soon as possible to minimize any possible damage.

Do not click on the Ads generated by eFast Browser and do not download anything it offers you

One should always remember that reputable businesses rarely chose to advertise through shady programs such as eFast Browser . The Ads are much more likely to advertise 3rd world sites that are infected with viruses, malware or just be fraudulent. If you see something to your liking it is a much better idea to simply look it up on google yourself instead of clicking on the Ad, but the best course of action remains to simply ignore these Ads.

Another danger to be aware of is that eFast Browser 見分け方 may try to further infect your computer in a more direct, yet subtle way. This is done through the promotion of PC analyzing, repairing and optimizing software which is most often actually bloatware/spyware or simply virus infected. In order to make you more compliant into downloading this dangerous executable file eFast Browser is capable of creating Ads that look exactly like system messages originating from your own computer. Below is included a list of possible tricks used, but remember that it is in no way exhaustive.

  • Missing plug-in is required to be installed
  • I video player codec is needed in order to see a video online
  • One of your programs (Flash, Java etc) is supposedly outdated and you should download an update for it

These three are commonly responsible for the download of virus and malware infected files.

  • On online scanner searched your computer for free and found a number of issues like virus infections, registry errors, spyware alerts, HDD health issues and more

Similar messages are associated with bloatware. These programs pretend to resolve issues with your computer, but in reality they do absolutely nothing. They simply generate fake messages about non-existing problems and if you make the mistake of paying them they will simply halt the fake messages giving you a false sense of security. This is what eFast Browser 見分け方 does.

Overall we strongly recommend that you DO NOT download and install anything offered to you by an online Ad until you get rid of eFast Browser.



Name of Threat eFast Browser
Type Japanese-targeted Adware threat
Danger Level Medium (Advertises low quality products, may try to scam you)
Symptoms Unwanted Ads appear, unauthorized tabs are created, general slowness thanks to added system load.
Distribution Method Software bundles most commonly, sometimes download via dangerous Ads found on sites or generated via other Adware

1: Enter Safe Mode.
2: Remove eFast Browser from Chrome, Firefox, Internet Explorer and Safari.
3: Remove the virus from browser shortcuts.
4: Uninstall the virus from your AddRemove Programs.
5: Permanently remove eFast Browser from Task Manager’s processes.
6: Remove the virus from Regedit and Msconfig.

Remove eFast Browser


The first thing to do is a reboot in Safe Mode. If you already know how to do it, just skip this and proceed to Step 2. If you do not know how to do it, continue reading:

For Windows 98, XP, Millenium and 7: 

Restart your computer. To be sure you don’t miss the time when you need to press it, just spam F8 as soon as the PC starts booting. Then choose Safe Mode With Networking.

For W8 and 8.1:

Click the Start button, then Control Panel —> System and Security —> Administrative Tools —> System Configuration.Administrator permission required


Then check the Safe Boot option and click OK.  Click  Restart in the pop-up.

For W10:

  1. Open the Start menu.
  2. Click the power button icon in the right corner of the Start menu to show the power options menu.
  3. Press and hold down the SHIFT key on the keyboard and click the Restart option while still holding down the SHIFT key.

W10 will perform the reboot. Next do the following:

Click the Troubleshoot icon, then Advanced options —> Startup Settings. Click Restart.
After the reboot click on Enter Safe Mode With Networking (Fifth Option).


To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.

If you want to avoid the risk, we recommend downloading SpyHunter
a professional malware removal tool.

More information on SpyHunter, steps to uninstallEULAThreat Assessment Criteria, and Privacy Policy.

It is likely that eFast Browser has infected all of your internet browsers. You’ll need to clean each of your currently installed browsers separately by running them through Step 2 and Step 3. While you are doing this pay attention to any confirmation messages that may pop when you try to clear eFast Browser. Such applications sometimes try to install other Adware from the same developer when you try to remove them. Carefully avoid any option that will make you visit any site or download another program.

ie9-10_512x512  Remove the Malware from Internet Explorer:

Open IE, then click  IE GEAR —–> Manage Add-ons.

pic 3

Find eFast Browser . Remove it by pressing Disable.

If your Home Page is different from the usual, click IE GEAR —–> Internet Options>edit the URL box with your preferred search engine, and click Apply.

firefox-512 Remove eFast Browser from Firefox:

Open Firefoxclick on mozilla menu (top right) ——-> Add-onsHit Extensions next.

pic 6

eFast Browser  should be somewhere around here –  Remove it.

chrome-logo-transparent-backgroundRemove eFast Browser from Chrome:

 Start Chrome, click chrome menu icon —–>More Tools —–> Extensions. There,  find the malware and  select  chrome-trash-icon(Remove).

pic 8

 Click chrome menu icon again, and proceed to Settings —> Search, the fourth tab, select Manage Search Engines.  Remove everything but the search engines you normally use.

safari Remove the malware from Safari:

Open Safari, and click Safari —–>Preferences —–> Extensions—–>Uninstall the malware.


Right click on the browser’s shortcut, then click Properties.

NOTE: We are showing Google Chrome, but the method is the same for Chrome, Firefox, Internet Explorer, Safari, and Microsoft Edge.


Once you’ve reached Properties —–> Shortcut (on the band at the top), then in the Target type field, REMOVE EVERYTHING AFTER .exe.


Hold the Start Key and R together. Write appwiz.cpl in the field, then click OK.


You are now in the Control Panel. Search around for eFast Browser and suspicious-looking programs. Uninstall it/them. Also, be extremely careful. Viruses often spend one last ditch effort to trick you into installing more of their kind. If you see a screen like this when you click Uninstallchoose NO:


Hold the Start Key and R againbut this time copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A .txt file will open – don’t type or change it. If you are hacked and someone has access to your PC, there will be a bunch of other IPs connected to you at the bottom. This is what a hosts file looks like:

hosts_opt (1)

If there are a bunch of strange IPs connecting to you below “Localhost” you may be hacked, and it’s best to ask us in the comments for directions.


Open the Task Manager by right clicking on the Taskbar and choosing Start Task Manager.


Once it opens, choose the Processes Tab. Look at all of the processes in front of you and try to determine which ones are a virus. Google them or ask us in the comments and we will provide the best assistance we can.


What we have to take care of next can be a bit dangerous, but it is very important if you want to make sure all traces of eFast Browser are deleted. Follow the instructions carefully and doublecheck before deleting any file, because if you remove the wrong files you could damage your PC significantly. If you are not feeling comfortable trying something like this we can recommend you to instead download our preferred anti-malware program. We’ve tested it exclusively and so far it has been able to get rid of every nasty piece of malware we’ve thrown against it.



Right click on each of the virus processes separately and select Open File Location. Also, End the process after you open the folder. Just to make sure we don’t delete any programs you mistakenly took for a virus, copy the folders somewhere, then delete the directories you were sent to.


Take a look at the following things:

Type msconfig in the search field and hit enter: you will be transported to a Pop Up window. 


Go in the Startup tab and Uncheck entries that have “Unknown” as Manufacturer.

Type Regedit in the windows search field and press Enter.

Once inside, press CTRL and F together and type the virus’s Name. Right click and delete any entries you find with a similar name. If you can’t find them this way, look in these directories, and delete/uninstall the registries manually:

  • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious, but bear in mind they are always different.
    HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
    HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

Remember to leave us a comment if you run into any trouble!

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