84,488,480 programs installed

Should I remove Appstein?

What percent of users and experts removed it?
82% remove it18% keep it
Overall Sentiment
What do people think about it?
(click star to rate)
How common is it?
Reach 0.0004%
Lifespan of installation (until removal)
< 0.31 days
9.02 days >
Average installed length: 4.74 days


2014.10.31.023103 12.50%
2014.10.22.192647 12.50%
2014.09.19.203252 12.50%
2014.09.17.083239 12.50%
2014.09.02.182803 12.50%
2014.08.31.090456 12.50%
2014.08.20.190658 25.00%


Remove Appstein
Powered by Reason Antivirus

What is Appstein?

Appstein is an Internet toolbar/plugin (for Internet Explorer it runs as a BHO, in Chrome and Firefox it will run as an extension) that plugs into the user's default web browser and will modify a number of settings such as taking control of the browser's search and home pages, new tab functionality as well as DNS 'not found' redirection. Additionally this potentially unwanted program will change some security settings of the browser that might also lower the overall security of the user's PC. This is done in order to allow the program to run uninterrupted.

Should the user attempt to uninstall the Appstein software using the standard methods in Add/Remove Programs, only parts of this PUP will be uninstalled and some items such as the modified search and home pages may still point to an unwanted web page. Also to note as disclosed in the privacy policy, the program will track and report behaviors or the user while the plugin is installed including but not limited to the URLs and web pages the user visits as well as search terms and search results the user queries.


The most common release is 2014.08.20.190658, with over 98% of all installations currently using this version. Upon being installed, the software adds a Windows Service which is designed to run continuously in the background. Manually stopping the service has been seen to cause the program to stop functing properly. It adds a background controller service that is set to automatically run. Delaying the start of this service is possible through the service manager. The primary executable is named updateAppstein.exe. A majority of users end up uninstalling this less than a week of it being installed. The setup package generally installs about 4 files and is usually about 1.09 MB (1,146,664 bytes).
  • Malware detected in the program
  • Installs a Windows Service
  • Typically distributed through a pay-per-install bundle
  • Hijacks the web browser's home page
  • This program has a poor reputation
  • The experts agree, you should remove it!
Warning, multiple anti-virus scanners have detected possible malware in Appstein.
updateAppstein.exe (ac4eb2475fc9516c5c7855487ed2ff07) has been flagged by the following 10 scanners:
Anti-Virus softwareVersionDetection
Antiy-AVL GrayWare[AdWare:not-a-virus,HEUR]/MSIL.Kranet
Baidu-International Adware.Win32.BrowseFox.AtNK
ESET-NOD32 8.10327 a variant of Win32/BrowseFox.H
IKARUS anti.virus t3scan. PUA.BrowseFox
Kaspersky not-a-virus:HEUR:AdWare.MSIL.Kranet
Kingsoft AntiVirus 331020.49267 Win32.Troj.Generic.a.(kcloud)
McAfee 5600.6941 Artemis!AC4EB2475FC9
Panda Antivirus Trj/Chgt.D
Qihoo-360 Win32/Virus.Adware.e4c
TrendMicro-HouseCall 7.2.324 Suspicious_GEN.F47V0826
Appstein has been found to be bundled with 3rd party software. If you have not purposefully installed this, you should be safe uninstalling it.
Find out how to remove Appstein.

Program detailsProgram details

Displayed publisher: Appstein
URL: appstein.info/support
Help link: mailto:[email protected]
Installation folder: C:\Program Files\Appstein
Uninstaller: C:\Program Files\Appstein\Appsteinuninstall.exe
Estimated size: 1.09 MB

Program filesFiles installed by Appstein

Program executable:updateAppstein.exe (Malware detected)
Path:C:\Program Files\Appstein\updateAppstein.exe
Additional files:
  • AppsteinUninstall.exe
  • updateAppstein.exe

Program behaviorsBehaviors exhibited

  • updateAppstein.exe runs as a service named 'Update Appstein' (Update Appstein).

How do I remove Appstein?

Quickly and completely remove Appstein from your computer by downloading Reason's ‘Should I Remove It?’ (click the button below).
Download Reason's ‘Should I Remove It?’Remove Appstein from your computer.
Or, you can uninstall Appstein from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program Appstein, click it, and then do one of the following:
    • Windows Vista/7/8: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove Appstein.
  4. If for some reason uninstallation fails, please install Microsoft's uninstall fixer utility which will help fix problems with programs that can't be uninstalled at support.microsoft.com.
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Win 7 (SP1) 50%
Win 10 50%
Windows Service? Yes
(Installs a service)
Uninstall it 82%
Keep it 18%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 7 50.00%
Windows 10 50.00%
Which OS releases does it run on?
Windows 7 Home Premium 50.00%
Windows 8.1 25.00%
Windows 8 Single Language 12.50%
Windows 10 Home 12.50%

Distribution by countryGeography

90.91% of installs come from the United States
Which countries install it?
  United States 90.91%
  Saudi Arabia 4.55%
  Malaysia 4.55%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Hewlett-Packard 42.86%
Acer 28.57%
Samsung 14.29%
ASUS 14.29%
Common models
HP 2000 Notebook PC 25.00%
Samsung RV411/RV511/E3511... 12.50%
Hewlett-Packard 500-310t 12.50%
HP-Pavilion NY604AA-ABA 3... 12.50%
Gateway ZX4970 12.50%
ASUSTeK S550CB 12.50%

About Yontoo Technology

Yontoo, a subsidiary/alias of ad-hijacker Sambreel, is a publisher of ad-supported web browser extensions designed to inject and display advertisements within the browser.
Publisher URL: www.yontoo.com


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