What is fastsearch_B7C5AC242193BB3E.dll?

The genuine fastsearch_B7C5AC242193BB3E.dll file is a software component of Google Toolbar by Google.
Fastsearch_B7C5AC242193BB3E.dll is a DLL (Dynamic Link Library) file that belongs to Google Toolbar, a browser addon for Internet Explorer and Firefox that provides a search box powered by Google Search and various other tools. DLL files store data, code and resources needed by one or more programs in order to function correctly. This file is a Browser Helper Object (BHO) that adds program functionality to Microsoft's Internet Explorer and other Internet browsers. This is not a critical Windows component and should be removed if known to cause problems. The Google Toolbar is a browser addon that integrates the Google search engine directly into non-Google browsers to make searching faster and easier. The toolbar comes integrated with Google+ functionality making it easy to share things directly from the toolbar. The toolbar can also translate pages with a single click, bookmark websites, find specific words in a page, highlight search terms and more. Google was founded in 1998 by Larry Page and Sergey Brin, Ph.D. students at Stanford. Google has since grown into one of the biggest companies in the world, offering hundreds of services, including webmail (Gmail), cloud storage (Google Drive), office software (Google Docs) and social networking services (Google+). Alexa, which provides web traffic data, lists Google as the world's most visited website. Its popularity has led to huge media coverage, including a major critique of the company over copyright, censorship, and privacy issues. Google is headquartered in Googleplex, Mountain View, California, USA.

fastsearch_B7C5AC242193BB3E stands for Fast Search

Fastsearch_B7C5AC242193BB3E.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 Fast Search.

Click to Run a Free Scan for fastsearch_B7C5AC242193BB3E.dll related errors

Fastsearch_B7C5AC242193BB3E.dll file information

The process known as Fast Search belongs to software Fast Search or Google Toolbar for Internet Explorer by Google (

Description: Fastsearch_B7C5AC242193BB3E.dll is not essential for the Windows OS and causes relatively few problems. The fastsearch_B7C5AC242193BB3E.dll file is located in a subfolder of "C:\Program Files". The file size on Windows 10/8/7/XP is 458,736 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 c84d72fe-e17d-4195-bb24-76c02e2e7c4e. The program is not visible. The fastsearch_B7C5AC242193BB3E.dll file is a Verisign signed file. It is able to monitor web browsers. It is certified by a trustworthy company. Fastsearch_B7C5AC242193BB3E.dll is not a Windows system file. Therefore the technical security rating is 33% dangerous; however you should also read the user reviews.

Uninstalling this variant: You could uninstall Google Toolbar for Internet Explorer from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify fastsearch_B7C5AC242193BB3E.dll related errors

Important: Some malware camouflages itself as fastsearch_B7C5AC242193BB3E.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the fastsearch_B7C5AC242193BB3E.dll process on your PC to see if it is a threat. If Fast Search 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 fastsearch_B7C5AC242193BB3E issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active fastsearch_B7C5AC242193BB3E process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the fastsearch_B7C5AC242193BB3E.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 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon 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 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

fastsearch_B7C5AC242193BB3E.dll [all]