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AppMaster virus. How to remove? (Uninstall guide)

removal by Alice Woods - - | Type: Adware

AppMaster virus is adware which mostly affects Windows 10 computer systems 

AppMaster virus
AppMaster is an adware application which uses deceptive techniques to reach the targeted computer system. It shows up in Task Manager as appmaster.exe

AppMaster virus is considered to be an adware-related program[1] which provides intrusive advertisements in forms of banner ads, pop-ups, pop-unders, etc. According to researches, this rogue application mostly appears on Windows 10 OS together with AppSync, ZipCruncher and similar apps. Once inside the computer, it drops its executable in the Task Manager (can be found as appmaster.exe 32 bit) and hijacks web browsers. Additionally, this potentially unwanted application (PUA)[2] starts its rogue activities, including unwanted advertisements, which are displayed on websites which typically don't show ads, and redirects to sponsored sites. At the moment, the virus is detected as PUP.Optional.AppMaster. However, to get rid of its ads completely, you should also remove AppSync, and other PUPs.

Name AppMaster
Type Adware
Spread together AppSync, ZipCruncher
Mostly infected OS Windows 10
Activities Unwanted advertising, redirects, browser changes
Possible dangers This rogue app can take you to potentially harmful pages
Detected as PUP.Optional.AppMaster
Detect it Use Reimage for adware detection

AppMaster adware is an unwanted program which brings even more unpleasant changes when it infiltrates Windows OS. Technically, this application is not harmful itself but, due to its secret installation techniques, some users have started calling it virus. Nevertheless, the unwanted program can take the user to potentially infected websites. In such pages, you can easily get infected with malware software.

PUP.Optional.AppMaster often enters the computer system unnoticed and hijacks web browsers. However, first, the app installs and runs in the Task Manager section. If you have found this suspicious-looking software on your Windows computer, note that you will need to end all processes that relate to the adware app and also get rid of the unwanted content from where it has been injected.

Furthermore, users have been discussing in Windows forums that AppMaster virus appears together with the AppSync application. These two programs can be spotted in the startup menu of the computer. Continuously, other people have claimed that PUP.Optional.AppMaster has a relation with ZipCruncher application and they also appear in the system together.[3]

Advertising posts which are caused by the adware might try to trick and convince users to visit various rogue pages where people can find computer cleaning and optimization tools for their machines. However, these programs often appear to be useless, they just have nicely-looking advertisements. So, better remove AppMaster virus before it takes you to such an unpleasant site. Use Reimage to find all adware-added components such as browser extensions and other related content.

Furthermore, AppMaster can perform some changes to your web browser. This cyber infection can modify the homepage and new tab URL section of your mostly-used browser, and each time you try to type in a search query, you might be redirected to developer-sponsored websites. This is also another unwanted cause of adware-type programs.

Sadly, if you hesitate to perform the AppMaster removal, this rogue application will start appearing more and more frequently and intruding all of your activities. Later on, it might start overusing your computer resources for all of the advertising activity. Nevertheless, there is a big chance that your infected web browser will start slowing down or even crashing.

Adware applications often enter users computer systems unknowingly

Adware infections can sometimes come out of nowhere. However, it is not exactly from NOWHERE. According to computer researchers from Virusai.lt web page,[4] adware applications and similar programs often distribute by using these techniques:

  • Bundled software. Sometimes regular programs might contain various rogue components together with them. Such content downloads secretly while using irregular downloaders or by skipping installing steps.
  • Through third-party sources. These kinds of networks might be torrent downloading websites[5] such as Torrents, The Pirate Bay, and others. They come unprotected and might include unsafe content.

To avoid unwanted downloads, you should choose the Custom or Advanced installation mode where you will be able to track all incoming objects. Furthermore, if you are performing a downloading or installing process by yourself, make sure that you do not skip or rush any steps as you can easily allow various potentially unwanted components to sneak in the system.

Remove AppMaster adware from the infected system and hijacked browser apps

Delete the adware app with automatical or manual technique. If you want to remove AppMaster virus manually, open web browsers such as Google Chrome, Mozilla Firefox, Internet Explorer, Microsoft Edge, and Safari. After that, search for any suspicious browser extensions, add-ons, or plug-ins that might have been planted by the adware application.

AppMaster removal requires terminating every single component which relates to the adware app. If you leave some questionable content in the system, there is a big chance that all unpleasant activities will renew with the next computer boot. Furthermore, you can look for some more-detailed instructions below this article. 

You can remove virus damage automatically with a help of one of these programs: Reimage, SpyHunterCombo Cleaner, Malwarebytes Malwarebytes. We recommend these applications because they detect potentially unwanted programs and viruses with all their files and registry entries that are related to them.

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What to do if failed?
If you failed to remove virus damage using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to remove virus damage. 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.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with SpyHunter.
Alternative Software
Different security software includes different virus database. If you didn’t succeed in finding malware with Reimage, try running alternative scan with Combo Cleaner.

To remove AppMaster virus, follow these steps:

WindowsInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Uninstall AppMaster from Windows systems

Clean the Windows operating system from all unwanted components and make sure that the adware program has been removed successfully and will not return:

  1. Click Start Control Panel Programs and Features (if you are Windows XP user, click on Add/Remove Programs). Click 'Start -> Control Panel -> Programs and Features' (if you are 'Windows XP' user, click on 'Add/Remove Programs').
  2. If you are Windows 10 / Windows 8 user, then right-click in the lower left corner of the screen. Once Quick Access Menu shows up, select Control Panel and Uninstall a Program. If you are 'Windows 10 / Windows 8' user, then right-click in the lower left corner of the screen. Once 'Quick Access Menu' shows up, select 'Control Panel' and 'Uninstall a Program'.
  3. Uninstall AppMaster and related programs
    Here, look for AppMaster or any other recently installed suspicious programs.
  4. Uninstall them and click OK to save these changes. Right click on each of suspicious entries and select 'Uninstall'
WindowsInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Eliminate AppMaster from Internet Explorer (IE)

If Explorer got affected by the adware application, you need to reverse all changes and remove browser add-ons. For this purpose, take a look at these guidelines:

  1. Remove dangerous add-ons
    Open Internet Explorer, click on the Gear icon (IE menu) on the top right corner of the browser and choose Manage Add-ons. Click on menu icon and select 'Manage add-ons'
  2. You will see a Manage Add-ons window. Here, look for AppMaster and other suspicious plugins. Disable these entries by clicking Disable: Right click on each of malicious entries and select 'Disable'
  3. Change your homepage if it was altered by virus:
    Click on the gear icon (menu) on the top right corner of the browser and select Internet Options. Stay in General tab.
  4. Here, remove malicious URL and enter preferable domain name. Click Apply to save changes. Delete malicious URL, enter your desired domain name and click 'Apply' to save changes
  5. Reset Internet Explorer
    Click on the gear icon (menu) again and select Internet options. Go to Advanced tab.
  6. Here, select Reset.
  7. When in the new window, check Delete personal settings and select Reset again to complete AppMaster removal. Go to 'Advanced' tab and click on 'Reset' button. Now select 'Delete personal settings' and click on 'Reset' button again
WindowsInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Erase AppMaster virus from Microsoft Edge

Reset Microsoft Edge settings (Method 1):

  1. Launch Microsoft Edge app and click More (three dots at the top right corner of the screen).
  2. Click Settings to open more options.
  3. Once Settings window shows up, click Choose what to clear button under Clear browsing data option. Go to Settings and select 'Choose what to clear'
  4. Here, select all what you want to remove and click Clear. Select 'Clear' button
  5. Now you should right-click on the Start button (Windows logo). Here, select Task Manager. Open the start menu and select 'Task Manager'
  6. When in Processes tab, search for Microsoft Edge.
  7. Right-click on it and choose Go to details option. If can’t see Go to details option, click More details and repeat previous steps. Right-click 'Microsoft Edge' and select 'Go to details' Select 'More details' if 'Go to details' option fails to show up
  8. When Details tab shows up, find every entry with Microsoft Edge name in it. Right click on each of them and select End Task to end these entries. Find Microsoft Edge entries and select 'End Task'

Resetting Microsoft Edge browser (Method 2):

If Method 1 failed to help you, you need to use an advanced Edge reset method.

  1. Note: you need to backup your data before using this method.
  2. Find this folder on your computer: C:\Users\%username%\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe.
  3. Select every entry which is saved on it and right click with your mouse. Then Delete option. Go to Microsoft Edge folder on your computer, right-click every entry and click 'Delete'
  4. Click the Start button (Windows logo) and type in window power in Search my stuff line.
  5. Right-click the Windows PowerShell entry and choose Run as administrator. Find Windows PowerShell, right-click it and select 'Run as administrator'
  6. Once Administrator: Windows PowerShell window shows up, paste this command line after PS C:\WINDOWS\system32> and press Enter:
    Get-AppXPackage -AllUsers -Name Microsoft.MicrosoftEdge | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register $($_.InstallLocation)\AppXManifest.xml -Verbose}
    Copy and paste a required command and press 'Enter'

Once these steps are finished, AppMaster should be removed from your Microsoft Edge browser.

WindowsInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Delete AppMaster from Mozilla Firefox (FF)

You can refresh the Firefox browser and eliminate all unwanted changes by performing this guide:

  1. Remove dangerous extensions
    Open Mozilla Firefox, click on the menu icon (top right corner) and select Add-ons Extensions. Click on menu icon and select 'Add-ons'
  2. Here, select AppMaster and other questionable plugins. Click Remove to delete these entries. Select 'Extensions' and look for malicious entries. Click 'Remove' to get rid of each of them
  3. Reset Mozilla Firefox
    Click on the Firefox menu on the top left and click on the question mark. Here, choose Troubleshooting Information. Click on menu icon and then on '?'. Select 'Troubleshooting Information'
  4. Now you will see Reset Firefox to its default state message with Reset Firefox button. Click this button for several times and complete AppMaster removal. Click on 'Reset Firefox' button for a couple of times
WindowsInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Remove AppMaster from Google Chrome

Clean Google Chrome from all adware-related objects. Take a look at these instructions if help is needed:

  1. Delete malicious plugins
    Open Google Chrome, click on the menu icon (top right corner) and select Tools Extensions. Click on menu icon. Select 'Tools' and 'Extensions'
  2. Here, select AppMaster and other malicious plugins and select trash icon to delete these entries. Look for malicious entries and delete each of them by clicking on the Trash bin icon
  3. Click on menu icon again and choose Settings Manage Search engines under the Search section. When in 'Settings', select 'Manage search engines...'
  4. When in Search Engines..., remove malicious search sites. You should leave only Google or your preferred domain name. Click 'X' to remove malicious URLs
  5. Reset Google Chrome
    Click on menu icon on the top right of your Google Chrome and select Settings.
  6. Scroll down to the end of the page and click on Reset browser settings. When in 'Settings', scroll down to 'Reset browser settings' button and click on it
  7. Click Reset to confirm this action and complete AppMaster removal. Click on 'Reset' button to complete your removal
WindowsInternet ExplorerMicrosoft EdgeFirefoxGoogle ChromeSafari

Uninstall AppMaster from Safari

  1. Remove dangerous extensions
    Open Safari web browser and click on Safari in menu at the top left of the screen. Once you do this, select Preferences. Click on 'Safari' and select 'Preferences'
  2. Here, select Extensions and look for AppMaster or other suspicious entries. Click on the Uninstall button to get rid each of them. Go to 'Extensions' and uninstall malicious add-ons
  3. Reset Safari
    Open Safari browser and click on Safari in menu section at the top left of the screen. Here, select Reset Safari.... Click on 'Safari' and select 'Reset Safari...'
  4. Now you will see a detailed dialog window filled with reset options. All of those options are usually checked, but you can specify which of them you want to reset. Click the Reset button to complete AppMaster removal process. Select all options and click on 'Reset' button

About the author

Alice Woods
Alice Woods - Likes to teach users about virus prevention

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