Some anti-malware programs classify altavista.dll as a harmful extension to Internet Explorer: e.g. Dynamic Toolbar (detected by Sophos), and potentially unwanted program Generic PUP (detected by McAfee). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated Altavista Toolbar from altavista.com 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 Altavista Toolbar from altavista.com and how to get rid of it.
Description: Altavista.dll is not essential for the Windows OS and causes relatively few problems. Altavista.dll is located in a subfolder of C:\Windows.
The file size on Windows 10/8/7/XP is 955,904 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-92EA-EC65A294AE31. There is no file information. The program is not visible. The file is able to change the behavior of, or monitor Internet Explorer. The service has no detailed description. It is not a Windows system file. Altavista.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 68% dangerous; however you should also read the user reviews.
Recommended: Identify altavista.dll related errors
If altavista.dll is located in a subfolder of "C:\Program Files", the security rating is 67% dangerous. The file size is 1,819,648 bytes (83% of all occurrences) or 785,920 bytes. The program has no visible window. It is able to monitor web browsers. The service has no detailed description. The file is not a Windows core file. Altavista.dll is able to record keyboard and mouse inputs.
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Important: Some malware camouflages itself as altavista.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Dynamic Toolbar (detected by Sophos), and potentially unwanted program Generic PUP (detected by McAfee). Therefore, you should check the altavista.dll process on your PC to see if it is a threat. If Altavista Toolbar from altavista.com 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 altavista process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the altavista.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.