Coupon Companion Plugin.dll is a browser extension for Internet Explorer. This add-on enables several additional functions for Internet Explorer. You can disable it through the Extras menu (key combination Alt + X) under Manage Add-ons. The following paragraph provides more information about Coupon Companion Plugin BHO.
Description: Coupon Companion Plugin.dll is not essential for the Windows OS and causes relatively few problems. Coupon Companion Plugin.dll is located in a subfolder of "C:\Program Files".
Known file sizes on Windows 10/8/7/XP are 637,952 bytes (75% of all occurrences) or 613,376 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 11111111-1111-1111-1111-110211181104. The program has no visible window. The file is able to change the behavior of, or monitor Internet Explorer. Coupon Companion Plugin.dll is not a Windows system file. Coupon Companion Plugin.dll is able to monitor applications. Therefore the technical security rating is 54% dangerous.
Recommended: Identify Coupon Companion Plugin.dll related errors
Important: Some malware camouflages itself as Coupon Companion Plugin.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the Coupon Companion Plugin.dll process on your PC to see if it is a threat. If Coupon Companion Plugin BHO has changed your browser's search engine and start page, you can recover your browser's default settings as follows:Reset default browser settings for Internet-Explorer ▾
The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active Coupon Companion Plugin process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the Coupon Companion Plugin.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.
A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.