What is B~NSISu_.exe?

The genuine B~NSISu_.exe file is a software component of AOL Toolbar by AOL.
B~NSISu_.exe is an executable file that belongs to AOL Toolbar, a browser extension that adds functionality to AOL Instant Messenger. DLL files store data, code and resources needed by one or more programs in order to function correctly. This process is a BHO (browser helper object), a plugin designed to add functionality to Microsoft's Internet Explorer. This is not an essential Windows process and can be disabled if known to create problems. The AOL Toolbar attaches a slim toolbar to the Internet Explorer window which provides shortcut buttons that offer quick links to the Internet, AOL Instant Messenger, pop-up blocker, and browser history cleaner. The program offers customization in the form of more widgets and themes. America Online (AOL) is an American telecommunications company that was established in 1985 by Jim Kimsey. It was originally called Quantum Computer Services and provided online services. AOL Inc. is based in New York City and develops and invests in web sites and brands. AOL distributes digital content, markets products, and offers numerous services to consumers, publishers, and advertisers.

B~NSISu_ stands for AOL Diagnostics Build

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the B~NSISu_.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

Click to Run a Free Scan for B~NSISu_.exe related errors

B~NSISu_.exe file information

The process known as AOL Diagnostics Build (version belongs to software AOL Diagnostics by AOL (

Description: B~NSISu_.exe is not essential for the Windows OS and causes relatively few problems. B~NSISu_.exe is located in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 44,955 bytes (50% of all occurrences) or 89,837 bytes. 
The program is not visible. It is not a Windows system file. B~NSISu_.exe is able to record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 49% dangerous.

Recommended: Identify B~NSISu_.exe related errors

Important: Some malware camouflages itself as B~NSISu_.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the B~NSISu_.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

One user thinks B~NSISu_.exe is dangerous and recommends removing it.

Do you have additional information? Help other users!
What do you know about B~NSISu_.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving B~NSISu_ issues

A clean and tidy computer is the key requirement for avoiding problems with B~NSISu_. 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.

To help you analyze the B~NSISu_.exe process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

B~NSISu_.exe [all]