The ATTToolbar.dll file is a software component of AT&T Toolbar by AT&T.
ATTToolbar.dll is a DLL (Dynamic Link Library) file that belongs to the AT&T Toolbar, a web browser toolbar that modifies search results and home pages. DLL files store data, code and resources needed by one or more programs in order to function correctly. This is not an essential process for Windows and can be disabled if known to create problems. AT&T Toolbar is free and customizable search and bookmarking tool powered by Yahoo!. The toolbar integrates with an att.net account and works as a browser extension that provides access to applications and websites with a single click. The program is free for all att.net customers. AT&T Inc. is an American multinational telecommunications corporation, which was founded in 1983. It was formerly called the Southwestern Bell Corporation till 1995. It can indirectly trace its origin back to the original Bell Telephone Company founded by Alexander Graham Bell after he invented the telephone. Today, AT&T is headquartered at Whitacre Tower in Dallas, Texas. AT&T is the largest provider for cellular telephones in the United States.
ATTToolbar stands for AT&T Toolbar Component
Some anti-malware programs classify ATTToolbar.dll as a harmful extension to Internet Explorer: e.g. Application.Generic.46840 (detected by BitDefender), and Application.Generic.46840 (detected by F-Secure). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated Toolbar Component 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 Toolbar Component and how to get rid of it.
Description: ATTToolbar.dll is not essential for the Windows OS and causes relatively few problems. The ATTToolbar.dll file is located in a subfolder of "C:\Program Files".
The file size on Windows 10/8/7/XP is 1,865,544 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 4E7BD74F-2B8D-469E-94BE-FD60BB9AAE29. The program has no visible window. The file is a Verisign signed file. The ATTToolbar.dll file is able to change the behavior of, or monitor Internet Explorer. The file has a digital signature. There is no detailed description of this service. The ATTToolbar.dll file is not a Windows core file. ATTToolbar.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 48% dangerous.
Recommended: Identify ATTToolbar.dll related errors
Important: Some malware camouflages itself as ATTToolbar.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Application.Generic.46840 (detected by BitDefender), and Application.Generic.46840 (detected by F-Secure). Therefore, you should check the ATTToolbar.dll process on your PC to see if it is a threat. If Toolbar Component 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: ASecurity Task Manager examines the active ATTToolbar process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the ATTToolbar.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.