How to remove the UnfriendApp malware

Some anti-malware programs classify common.dll as a harmful extension to Internet Explorer: for instance Win32:BHO-AMO [PUP] (detected by Avast), and Record Checker (detected by Sophos). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated UnfriendApp software, it's no surprise. In most cases, this kind of adware is installed on the side when you install a freeware product like a Youtube Downloader or a PDF Converter. In the following selection, you can read more about UnfriendApp and how to get rid of it.

Click here to automatically remove the UnfriendApp malware

Common.dll file information

The process known as UnfriendApp or SearchDonkey or InfoSeeker or SafeMonitor or TubeDimmer or FriendsChecker or Websteroids or SpyAlert

belongs to software UnfriendApp or SearchDonkey or InfoSeeker or Safe Monitor or Tube Dimmer or Better Experience or Websteroids or Spy Guard or FriendsChecker

by WebAppTech Coding or UnfriendApp or Big Water Applications or Creative Island Media or Better Experience or Western Web Applications or FriendsChecker or CoverBurst.

Description: Common.dll is not essential for the Windows OS and causes relatively few problems. The common.dll file is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 392,328 bytes (25% of all occurrences), 392,296 bytes and 9 more variants. 
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 44ed99e2-16a6-4b89-80d6-5b21cf42e78b. There is no file information. The program has no visible window. Common.dll is able to change the behavior of, or monitor Internet Explorer. The common.dll file is not a Windows core file. The file is certified by a trustworthy company. Therefore the technical security rating is 52% dangerous.

Uninstalling this variant: If you run into problems with common.dll, you can do the following:
  1) safely remove the program using the uninstall program of UnfriendApp or InfoSeeker (Control Panel ⇒ Uninstall a Program)
  2) get help from the software vendor Unfriendapp.

Recommended: Identify common.dll related errors

Important: Some malware camouflages itself as common.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Win32:BHO-AMO [PUP] (detected by Avast), and Record Checker (detected by Sophos). Therefore, you should check the common.dll process on your PC to see if it is a threat. If UnfriendApp 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 ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


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Best practices for resolving common issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active common process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the common.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.

Other processes

common.dll [all]