What is apihelper.dll file ?

Most antivirus programs classify APIHelper.dll as a harmful extension to Internet Explorer: e.g. ADW_Adstantinko (detected by TrendMicro), and not-a-virus:AdWare.Win32.BHO.bera (detected by Kaspersky).

Follow steps bellow to try fix the problem with apihelper.dll

1. Use cleanmgr

To run the command cleanmgr :
Press Windows key + Q.
Enter cmd in search box , followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command cleanmgr and press Enter.

2. Use sfc /scannow

To run the command sfc /scannow :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command sfc /scannow and press Enter.

3. uninstalling programs :

To uninstall unnecessary programs :
Open the Start menu (Press Windows key + X) .
Click the first menu item Programs and Features.
Search unnecessary programs in the list of installed programs, .
Click the software you want to uninstall.

4. using msconfig

To run the command msconfig :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command msconfig and press Enter.

5. Automatic Update

To run the command wuauclt /ShowWindowsUpdate:
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command wuauclt /ShowWindowsUpdate and press Enter.

6. Use resmon command

To run the command resmon :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command resmon and press Enter.

7. use DISM.exe

To run the command DISM.exe /Online /Cleanup-image /Restorehealth :
Press Windows key + Q.
Enter cmd in search box, followed by the combination Ctrl + Shift + Enter to run it as Administrator.
Enter the command DISM.exe /Online /Cleanup-image /Restorehealth and press Enter.

apihelper.dll descriptions

APIHelper.dll is not essential for Windows and will often cause problems. APIHelper.dll is located in a subfolder of the user’s profile folder or sometimes in a subfolder of “C:Program Files”—common is C:UsersUSERNAMEAppDataLocalMicrosoftInternet ExplorerExtensions or C:UsersUSERNAMELocal SettingsApplication DataMicrosoftInternet ExplorerExtensions.;Known file sizes on Windows 10/8/7/XP are 199,168 bytes (54% of all occurrences) or 242,688 bytes.;This.dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware.;IDs used by this BHO include 0CB66BA8-5E1F-4963-93D1-E1D6B78FE9A2.;There is no file information. The program has no visible window. APIHelper.dll is able to monitor web browsers. APIHelper.dll is not a Windows system file.;Therefore the technical security rating is 64% dangerous.