Some anti-malware programs classify DefaultTabBHO.dll as a harmful extension to Internet Explorer: for instance not-a-virus:WebToolbar.Win32.Agent.ayw (detected by Kaspersky), and Generic PUA CE (PUA) (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 Search Results 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 Search Results and how to get rid of it.
Description: DefaultTabBHO.dll is not essential for Windows and will often cause problems. DefaultTabBHO.dll is located in a subfolder of the user's profile folder or sometimes in a subfolder of C:\Windows\System32 or in a subfolder of C:\Windows.
Known file sizes on Windows 10/8/7/XP are 433,272 bytes (33% of all occurrences), 430,712 bytes and 11 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 7F6AFBF1-E065-4627-A2FD-810366367D01. The program is not visible. DefaultTabBHO.dll is able to change the behavior of, or monitor Internet Explorer. The file is certified by a trustworthy company. The DefaultTabBHO.dll file is not a Windows core file. DefaultTabBHO.dll is able to record keyboard and mouse inputs. Therefore the technical security rating is 50% dangerous, however you should also read the user reviews.
Recommended: Identify DefaultTabBHO.dll related errors
If DefaultTabBHO.dll is located in a subfolder of "C:\Program Files", the security rating is 50% dangerous. The file size is 433,272 bytes (31% of all occurrences), 468,600 bytes and 5 more variants. The program is not visible. It is able to change the behavior of, or monitor Internet Explorer. DefaultTabBHO.dll is certified by a trustworthy company. The DefaultTabBHO.dll file is not a Windows core file. DefaultTabBHO.dll is able to record keyboard and mouse inputs.
Important: Some malware also uses the file name DefaultTabBHO.dll, for example not-a-virus:WebToolbar.Win32.Agent.ayw (detected by Kaspersky), and Generic PUA CE (PUA) (detected by Sophos). Therefore, you should check the DefaultTabBHO.dll process on your PC to see if it is a threat. If Search Results 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 DefaultTabBHO process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the DefaultTabBHO.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.