How to uninstall CERX and other browser hijackers?

Also Known As: guj5.xyz browser hijacker
Distribution: Low
Damage level: Medium

Guj5.xyz redirect removal instructions

What is guj5.xyz?

Guj5.xyz is one of the fake search engines that are promoted through a potentially unwanted application (PUA), a browser hijacker called CERX. This PUA is related to another app of this type called QIP. As a rule, browser hijackers promote fake search engines by changing certain browser's settings. Also, most of them are designed to collect various data related to user's browsing activities. It is worth mentioning that guj5.xyz may be promoted through other browser hijackers (like Smash App +) as well.

guj5.xyz browser hijacker

Typically, browser hijackers change settings such as address of a homepage, default search engine and new tab. They make sure that users would visit an address of a fake search engine when they open a hijacked browser, new tab, or enter search queries into URL bar. Research shows that this particular app (CERX) does not always change the aforementioned settings. Even if it does not change them, it still detects when users enter search queries and redirect them to guj5.xyz. It is worth mentioning that guj5.xyz gets opened through qxsearch.com, another shady page. Either way, the only way to stop a browser from opening guj5.xyz (and qxsearch.com) is to uninstall CERX or any other app that is designed to promote this fake search engine. Furthermore, browser hijackers usually are designed to collect information related to user's browsing activities as well. Typically, they collect details like IP addresses, geolocations, entered search queries, addresses of visited websites, and other browsing-related data. Their developers tend to misuse gathered data to generate revenue, and/or they sell it to third parties (potentially cyber criminals) who use it for the same purpose. It is worth mentioning that browser hijackers can be designed to record not only browsing data but various personal information as well. People who have their browsers hijacked by apps of this type are being put at risk of problems related to browsing safety, privacy and so on. It is possible that gathered data may be misused to steal their identities as well.

Threat Summary:
Name guj5.xyz browser hijacker
Threat Type Browser Hijacker, Redirect, Search Hijacker, Toolbar, Unwanted New Tab
Browser Extension(s) CERX, Smash App+
Supposed Functionality Typically, browser hijackers supposed to deliver some features, improve browsing experience, etc.
Affected Browser Settings Homepage, new tab URL, default search engine
Detection Names Full List Of Detections (VirusTotal)
Serving IP Address 104.28.0.139
Symptoms Manipulated Internet browser settings (homepage, default Internet search engine, new tab settings). Users are forced to visit the hijacker's website and search the Internet using their search engines.
Distribution methods Deceptive pop-up ads, free software installers (bundling), fake Flash Player installers.
Damage Internet browser tracking (potential privacy issues), display of unwanted ads, redirects to dubious websites.
Removal

To eliminate guj5.xyz browser hijacker our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Other fake search engines that are promoted through CERX are bhj1.xyz, mkob.xyz and qikc.xyz. It is worth mentioning that browser hijackers often are advertised as useful, legitimate. They supposed to deliver various features or other value, however, very often they are completely useless. Quite often they are designed only to help their developers to generate revenue and put users at risk of various problems. Therefore, we recommend to uninstall CERX, Smash App+ or any other browser hijacker that is (if is) installed on a browser and/or operating system.

How did guj5.xyz install on my computer?

Very often developers proliferate PUAs by using a deceptive marketing method called "bundling". They use this method to trick people into downloading and/or installing unwanted apps together with some other programs. They include PUAs in their download and/or installation setups and put information about it in their "Custom", "Advanced" and other similar settings. People who download and/or install programs without checking those settings often download and/install more than just a desired program. Sometimes unwanted downloads and/or installations can be caused by clicking deceptive ads that are desingned to run certain scripts.

How to avoid installation of potentially unwanted applications?

All software should be downloaded from official websites (and via direct links). Peer-to-Peer networks (torrent clients, eMule, and so on), unofficial websites, third party downloaders, isntallers, and other similar download and installation tools should not be used. Quite often they are monetized by promoting various unwanted applications. Also, we recommend to always check settings (like "Advanced", Custom" and so on) of any download and/or installation setup and dismiss offers to download and/or install unwanted software. Intrusive advertisements that are displayed on unofficial (unreliable) web pages should not be clicked. It is because they often open potentially malicious websites or cause downloads, installations of unwanted apps. And finally, if there are any unwanted, suspicious apps (extensions, add-ons, plug-ins) installed on a browser or programs of this kind on the operating system, then they should be uninstalled as soon as possbile. If your computer is already infected with browser hijackers, we recommend running a scan with Spyhunter for Windows to automatically eliminate it.

Deceptive website encourages to update Firefox with a fake installer that is designed to install CERX:

guj5.xyz fake firefox update

 CERX asks for a permission to access certain data:

guj5.xyz edirect cerx permission

Deceptive website encourages to update Firefox with a fake installer that is designed to install Smash App+:

eceptive website encourages to update Firefox with a fake installer that is designed to install CERX:

Smash App+ wants to read data and change certain settings:

guj5-xyz-redirect-permission

CERX makes a browser to open guj5.xyz via qxsearch.com (GIF):

guj5.xyz- edirect appearance in gif image

Instant automatic removal of guj5.xyz browser hijacker: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of guj5.xyz browser hijacker. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

guj5.xyz redirect removal:

Windows 7 users:

Accessing Programs and Features (uninstall) in Windows 7

Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.

Windows XP users:

Accessing Add or Remove Programs in Windows XP

Click Start, choose Settings and click Control Panel. Locate and click Add or Remove Programs.

Windows 10 and Windows 8 users:

Accessing Programs and Features (uninstall) in Windows 8

Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.

Mac OSX users:

Uninstall app in OSX (Mac)

Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.

guj5.xyz browser hijacker uninstall via Control Panel

In the uninstall programs window: look for any recently installed suspicious applications (like "CERX"), select these entries and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted applications (which cause browser redirects to the guj5.xyz website), scan your computer for any remaining unwanted components. To scan your computer, use recommended malware removal software.

guj5.xyz redirect removal from Internet browsers:

Video showing how to remove browser redirects:

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Removing guj5.xyz related Internet Explorer extensions

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently installed suspicious extensions (like "CERX", "Smash App+"), select these entries and click "Remove".

Change your homepage:

Removing guj5.xyz from Internet Explorer homepage

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Internet Options", in the opened window remove hxxp://guj5.xyz and enter your preferred domain, which will open each time you launch Internet Explorer. You can also enter about: blank to open a blank page when you start Internet Explorer.

Change your default search engine:

Removing guj5.xyz from Internet Explorer default search engine

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". In the opened window, select "Search Providers", set "Google", "Bing", or any other preferred search engine as your default and then remove "CERX", "Smash App+" or other PUA.

Optional method:

If you continue to have problems with removal of the guj5.xyz browser hijacker, reset your Internet Explorer settings to default.

Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows XP

Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows 7

Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.

Reseting Internet Explorer settings to default in Windows 8 - accessing

In the opened window, select the Advanced tab.

Resetting Internet Explorer settings to default on Windows 8 - Internet options advanced tab

Click the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - click the Reset button in the Internet options advanced tab

Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - confirm settings reset to default by clicking the reset button

Google Chrome logoRemove malicious extensions from Google Chrome:

Removing guj5.xyz related Google Chrome extensions

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "More tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons (like "Smash App+", and/or "CERX") and remove them.

Change your homepage:

Removing guj5.xyz from Google Chrome homepage

Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "Settings". In the "On startup" section, disable "Smash App+", "CERX", or other PUA, look for a browser hijacker URL (hxxp://www.guj5.xyz) below the “Open a specific or set of pages” option. If present click on the three vertical dots icon and select “Remove”.

Change your default search engine:

Removing guj5.xyz from Google Chrome default search engine

To change your default search engine in Google Chrome: Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome), select "Settings", in the "Search engine" section, click "Manage search engines...", in the opened list look for "guj5.xyz" when located click the three vertical dots near this URL and select "Remove from list".

Optional method:

If you continue to have problems with removal of the guj5.xyz browser hijacker, reset your Google Chrome browser settings. Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.

Google Chrome settings reset step 1

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

Google Chrome settings reset step 2

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plugins from Mozilla Firefox:

Removing guj5.xyz related Mozilla Firefox extensions

Click the Firefox menu firefox menu icon (at the top right corner of the main window), select "Add-ons". Click on "Extensions" and remove "CERX", "Smash App+" or other recently installed, unwanted browser plug-ins.

Change your homepage:

Removing guj5.xyz from Mozilla Firefox homepage

To reset your homepage, click the Firefox menu firefox menu icon (at the top right corner of the main window), then select "Options", in the opened window disable "CERX", "Smash App+" or other installed PUA, remove hxxp://guj5.xyz and enter your preferred domain, which will open each time you start Mozilla Firefox.

Change your default search engine:

Removing guj5.xyz from Mozilla Firefox default search engine

In the URL address bar, type about:config and press Enter.
Click "I'll be careful, I promise!".
In the search filter at the top, type: "extensionControlled"
Set both results to "false" by either double-clicking each entry or clicking the Mozilla Firefox switch about:config entry button button.

Optional method:

Computer users who have problems with guj5.xyz browser hijacker removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

Removing browser hijackers from safari step 1 - accessing preferences

Make sure your Safari browser is active and click Safari menu, then select Preferences...

removing browser hijacker from safari step 2 - removing extensions

In the preferences window select the Extensions tab. Look for any recently installed suspicious extensions and uninstall them.

Removing browser hijackers from safari step 3 - changing homepage

In the preferences window select General tab and make sure that your homepage is set to a preferred URL, if its altered by a browser hijacker - change it.

removing browser hijackers from safari step 4 - changing the default Internet search engine

In the preferences window select Search tab and make sure that your preferred Internet search engine is selected.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

resetting safari step 1

In the opened window select all history and click the Clear History button.

resetting safari step 2

Microsoft Edge (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing browser hijackers from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Extensions". Locate any recently-installed suspicious browser add-ons, and remove them.

Change your homepage and new tab settings:

Removing browser hijackers from Microsoft Edge step 2

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Settings". In the "On startup" section look for the name of the browser hijacker and click "Disable".

Change your default Internet search engine:

Removing browser hijackers from Microsoft Edge step 3

To change your default search engine in Microsoft Edge: Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Privacy and services", scroll to bottom of the page and select "Address bar". In the "Search engines used in address bar" section look for the name of the unwanted Internet search engine, when located click the "Disable" button near it. Alternatively you can click on "Manage search engines", in the opened menu look for unwanted Internet search engine. Click on the puzzle icon Microsoft Edge (Chromium) puzzle icon near it and select "Disable".

Optional method:

If you continue to have problems with removal of the guj5.xyz browser hijacker, reset your Microsoft Edge browser settings. Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.

Microsoft Edge (Chromium) reset step 3

  • If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.

Summary:

declining installation of browser hijackers while downloading free software sampleA browser hijacker is a type of adware infection that modifies Internet browser settings by assigning the homepage and default Internet search engine settings to some other (unwanted) website URL. Commonly, this type of adware infiltrates operating systems through free software downloads. If your download is managed by a download client, ensure that you decline offers to install advertised toolbars or applications that seek to change your homepage and default Internet search engine settings.

Removal assistance:
If you are experiencing problems while trying to remove guj5.xyz browser hijacker from your Internet browsers, please ask for assistance in our malware support forum.

Post a comment:
If you have additional information on guj5.xyz browser hijacker or it's removal please share your knowledge in the comments section below.

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

Our malware removal guides are free. However, if you want to support us you can send us a donation.

Software uninstall instructions
Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
guj5.xyz browser hijacker QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of guj5.xyz browser hijacker on your mobile device.
We Recommend:

Get rid of guj5.xyz browser hijacker today:

▼ REMOVE IT NOW with Spyhunter

Platform: Windows

Editors' Rating for Spyhunter:
Editors ratingOutstanding!

[Back to Top]

Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.