What is fastsearch_A8904FB862BD9564.dll?

The genuine fastsearch_A8904FB862BD9564.dll file is a software component of Google Toolbar by Google.
Fastsearch_A8904FB862BD9564.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_A8904FB862BD9564 stands for Fast Search

Fastsearch_A8904FB862BD9564.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_A8904FB862BD9564.dll related errors

Fastsearch_A8904FB862BD9564.dll file information

The process known as Fast Search belongs to software Fast Search by Google (

Description: Fastsearch_A8904FB862BD9564.dll is not essential for the Windows OS and causes relatively few problems. The file fastsearch_A8904FB862BD9564.dll is located in a subfolder of "C:\Program Files". The file size on Windows 10/8/7/XP is 470,512 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. It is a Verisign signed file. The file is able to monitor web browsers. The file has a digital signature. Fastsearch_A8904FB862BD9564.dll is not a Windows core file. Therefore the technical security rating is 34% dangerous.

Recommended: Identify fastsearch_A8904FB862BD9564.dll related errors

Important: Some malware camouflages itself as fastsearch_A8904FB862BD9564.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the fastsearch_A8904FB862BD9564.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_A8904FB862BD9564 issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active fastsearch_A8904FB862BD9564 process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the fastsearch_A8904FB862BD9564.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

fastsearch_A8904FB862BD9564.dll [all]