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Should I remove Function Key Attachment?

What percent of users and experts removed it?
79% remove it21% keep it
Overall Sentiment
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How common is it?
Reach <0.001%


VersionDistribution 100.00%

Function Key Attachment

What is Function Key Attachment?

This is a WinCheck/CMI (variant) adware/browser hijacker variant that injects code into the user's web browser (IE, Chrome and Firefox). It is known as an ad-injector, a malicious process that once inside the web browser will hijack existing advertisements of underlying web sites (not associated with the website itself). It will also inject new ads in white space on the site or images that have standard banner sizes. These ads are typically for promoting shopping discount coupons, ads for PC optimizers or bundled PUP offers, or malvertising since it runs on sketchy ad networks.This runs as a startup process called WinCheck in the user's startup registry (Run key) and will execute each time the computer is restarted and the user logs in.

How do you know if you are infected? First, if you have this program installed then this adware is most likely still running. Next, you see ads in the browser that say something like "Ads by WinCheck".


During setup, the program creates a startup registration point in Windows in order to automatically start when any user boots the PC. The primary executable is named bnsvcb50.exe. A majority of users end up uninstalling this less than a week of it being installed.
  • Malware detected in the program
  • Automatically starts with Windows
  • Displays unwanted advertisements
  • Most users and experts agree, you should remove it!
Warning, multiple anti-virus scanners have detected possible malware in Function Key Attachment.
bnsvcb50.exe (69134f461d5707844dc8c400ff8095ab) has been flagged by the following 14 scanners:
Anti-Virus softwareVersionDetection
Lavasoft Ad-Aware 537 Application.Generic.1233347
AVware Trojan.Win32.Generic!BT
Baidu-International Adware.Win32.ConvertAd.77
Bitdefender Application.Generic.1233347
ESET-NOD32 9.11457 a variant of Win32/Adware.ConvertAd.DZ
Fortinet FortiGate 8/16/2015 Riskware/ConvertAd
F-Secure 11.2015-16-08_1 Application.Generic.1233347
G Data 15.8.25 Application.Generic.1233347
K7 AntiVirus 13.202.15557 Adware
K7GW 13.202.15558 Adware ( 004bbfb61 )
MicroWorld-eScan Application.Generic.1233347
Symantec 8/16/2015 rev. 1 WS.Reputation
TrendMicro-HouseCall 7.2.228 Suspicious_GEN.F47V0403
VIPRE Antivirus 39234 Trojan.Win32.Generic!BT
       View all 14 all detections

Program detailsProgram details

Installation folder: C:\users\user\appdata\local\b5f5b31b-1427570646-11e2-bbd8-0527725f24be
Uninstaller: "C:\users\user\appdata\Local\B5F5B31B-1427570646-11E2-BBD8-0527725F24BE\uninstall.exe"

Program filesFiles installed by Function Key Attachment

Program executable:bnsvcb50.exe (Malware detected)
Additional files:
  • Uninstall.exe

Program behaviorsBehaviors exhibited

Startup File (All Users Run)
  • bnsvCB50.exe is loaded in the all users (HKLM) registry as a startup file name 'WinCheck' which loads as C:\users\user\appdata\Local\B5F5B31B-1427570646-11E2-BBD8-0527725F24BE\bnsvCB50.exe.

How do I remove Function Key Attachment?

Quickly and completely remove Function Key Attachment from your computer by downloading "Should I Remove It?", its 100% FREE and installs in seconds (click the button below).
Download "Should I Remove It?", it's FREE!Remove Function Key Attachment from your computer.
Or, you can uninstall Function Key Attachment 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 Function Key Attachment, 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 Function Key Attachment.
  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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Automatically starts? Yes
(Found in the run registry)
Uninstall it 79%
Keep it 21%
Windows 7 (SP1)

Distribution by countryGeography

100.00% of installs come from the United States
Which countries install it?
  United States 100.00%


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