AppMaster Adware
Written by Tomas Meskauskas on (updated)
What is AppMaster?
AppMaster is a deceptive adware-type application that infiltrates systems without users’ permission. Research shows that this app records information relating to browsing activity and delivers various intrusive advertisements. For these reasons, AppMaster is categorized as a potentially unwanted application (PUA) and adware.
Following infiltration, AppMaster starts recording user-system information relating to browsing activity. Internet Protocol (IP) addresses, search queries, URLs visited, pages viewed, and other collected information often includes sensitive details that developers share with third parties (potentially, cyber criminals). The data is then misused to generate revenue.
Therefore, data tracking can lead to serious privacy issues or even identity theft. Another important issue is display of intrusive ads. Research shows that AppMaster delivers coupon, banner, pop-up, and other similar advertisements that are displayed using tools that enable placement of third party graphical content on any site.
Therefore, they often conceal underlying content, thereby diminishing the browsing experience. In addition, they can lead to infectious websites, and execute scripts that download and install malware. Even an single accidental click might result in high-risk computer infections. You are strongly advised to eliminate AppMaster adware immediately.
| Name | Ads by AppMaster |
| Threat Type | Adware, Unwanted ads, Pop-up Virus |
| Symptoms | Seeing advertisements not originating from the sites you are browsing. Intrusive pop-up ads. Decreased Internet browsing speed. |
| Distribution methods | Deceptive pop-up ads, free software installers (bundling), fake flash player installers. |
| Damage | Decreased computer performance, browser tracking - privacy issues, possible additional malware infections. |
| Malware Removal (Windows) | To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. |
AppMaster is virtually identical to Un-blocking, Torrent Extension, ScreenRecorder, and dozens of other adware-type applications. All offer 'useful features', however, these claims are merely attempts to give the impression of legitimacy. In fact all, PUAs are designed only to generate revenue for the developers.
Rather than enabling the functions promised, adware-type applications deliver intrusive advertisements and gather sensitive information. In doing so, adware poses a direct threat to your privacy and web browsing safety.
How did AppMaster install on my computer?
To proliferate AppMaster, developers use a deceptive marketing method called "bundling" - stealth installation of potentially unwanted applications together with regular software/apps. Developers are not honest enough to disclose PUA installations properly. Therefore, all are hidden within "Custom/Advanced" options (or other sections) of the download/installation processes.
AppMaster might also be distributed using intrusive advertisements. Furthermore, many users often rush download/installation processes and skip steps. In doing so, they expose their systems to risk of various infections and compromise their privacy.
How to avoid installation of potentially unwanted applications?
Carefully observe all download/installation steps using the "Custom" or "Advanced" settings. Opt-out of additionally-included applications and decline offers to download/install them. Your software should be downloaded from official sources only, using direct download links.
Third party downloaders/installers often include rogue apps and, therefore, these tools should be avoided. Remember that intrusive ads typically seem legitimate, but they are likely to redirect to untrustworthy websites (gambling, adult dating, pornography, etc.)
If you encounter these ads, immediately check the list of installed applications/browser extensions and eliminate any suspicious entries. Lack of knowledge and reckless behavoir are the main reasons for computer infections.
Caution is the key to safety. If your computer is already infected with AppMaster, we recommend running a scan with Combo Cleaner Antivirus for Windows to automatically eliminate this adware.
PDF Pro 100 - a potentially unwanted application that bundles AppMaster adware:
Official PDF Pro 100 PUA website:
Instant automatic malware removal:
Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Quick menu:
- What is AppMaster?
- STEP 1. Uninstall AppMaster application using Control Panel.
- STEP 2. Remove AppMaster adware from Internet Explorer.
- STEP 3. Remove AppMaster ads from Google Chrome.
- STEP 4. Remove 'Ads by AppMaster' from Mozilla Firefox.
- STEP 5. Remove AppMaster extension from Safari.
- STEP 6. Remove rogue plug-ins from Microsoft Edge.
AppMaster adware removal:
Windows 11 users:
Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.
Windows 10 users:
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.
Windows 7 users:
Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.
macOS (OSX) users:
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.
In the uninstall programs window, look for "AppMaster", select this entry and click "Uninstall" or "Remove".
After uninstalling the potentially unwanted application that causes AppMaster ads, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.
Remove AppMaster adware from Internet browsers:
At time of research, AppMaster did not install its browser plug-ins on Internet Explorer, Google Chrome, or Mozilla Firefox, however, it was bundled with other adware. Therefore, you are advised to remove all potentially unwanted browser add-ons from your Internet browsers.
Video showing how to remove potentially unwanted browser add-ons:
Remove malicious add-ons from Internet Explorer:
Click the "gear" icon 
(at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".
Optional method:
If you continue to have problems with removal of the ads by appmaster, 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.
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.
Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.
In the opened window, select the Advanced tab.
Click the Reset button.
Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.
Remove malicious extensions from Google Chrome:
Click the 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 and remove them.
Optional method:
If you continue to have problems with removal of the ads by appmaster, reset your Google Chrome browser settings. Click the 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.
After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.
In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.
Remove malicious plug-ins from Mozilla Firefox:
Click the Firefox menu 
(at the top right corner of the main window), select "Add-ons". Click on "Extensions", in the opened window, remove all recently-installed suspicious browser plug-ins.
Optional method:
Computer users who have problems with ads by appmaster removal can reset their Mozilla Firefox settings.
Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, in the opened menu, click Help.
Select Troubleshooting Information.
In the opened window, click the Refresh Firefox button.
In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.
Remove malicious extensions from Safari:
Make sure your Safari browser is active, click Safari menu, and select Preferences....
In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.
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...
In the opened window select all history and click the Clear History button.
Remove malicious extensions from Microsoft Edge:
Click the Edge menu icon 
(at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.
Optional method:
If you continue to have problems with removal of the ads by appmaster, reset your Microsoft Edge browser settings. Click the Edge menu icon (at the top right corner of Microsoft Edge) and select Settings.
In the opened settings menu select Reset settings.
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.
- If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.
Summary:
Commonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.
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Outstanding!
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