What is mswinext.exe?

The genuine mswinext.exe file is a software component of Microsoft Bing Bar by Microsoft.
The Microsoft Bing Bar is a browser extension that provides users with quick access to search tools powered by the Bing search engine. Mswinext.exe launches the Microsoft Bing Bar. This is not a critical Windows component and can be removed if known to cause problems.

The Bing Bar is a toolbar created for Internet Explorer by Microsoft. It was previously supported on Mozilla Firefox as well but Microsoft discontinued support, making sure the toolbar only works on Internet Explorer 7 and above. The toolbar provides easy access to weather, stocks, and news without needing to open a separate tab.

Microsoft, founded by Bill Gates and Paul Allen in 1975, is the world's largest software maker with respect to revenue. Microsoft is best known for the Windows operating system. The company quickly rose to fame and fortune following the success of its 1986 public share offering turning three people into billionaires and an estimated 12,000 Microsoft employees into millionaires. Microsoft is headquartered in Redmond, Washington, USA.

MsWinExt stands for Microsoft Bing Bar Windows Extension

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 mswinext.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 mswinext.exe related errors

Mswinext.exe file information

Windows Task Manager with mswinext
Mswinext.exe process in Windows Task Manager

The process known as MSN® Toolbar or Bing Bar belongs to software MSN Toolbar or Bing Bar by Microsoft (

Description: Mswinext.exe is not essential for Windows and will often cause problems. Mswinext.exe is located in a subfolder of "C:\Program Files (x86)"—for example C:\Program Files (x86)\MSN Toolbar\Platform\5.0.1449.0\. Known file sizes on Windows 10/8/7/XP are 243,544 bytes (41% of all occurrences), 240,992 bytes and 5 more variants. 
The program has no visible window. The file has a digital signature. It is not a Windows core file. The software starts when Windows starts (see Registry key: MACHINE\Run). The program listens for or sends data on open ports to a LAN or the Internet. Mswinext.exe is able to monitor applications. Therefore the technical security rating is 52% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you are having problems with mswinext.exe, you could also uninstall the program using the Control Panel ⇒ Uninstall a ProgramBing Toolbar, use the software publisher’s support or update the program to the latest version.

Recommended: Identify mswinext.exe related errors

Important: Some malware camouflages itself as mswinext.exe. Therefore, you should check the mswinext.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

Not much. But my virus program (norton internet security 2010) told me it's i virus. I deleted it. But im not sure if it really is that dangerous for you computer
All I know that it takes abundant amount of memory to run it and it is slowing down my users PC's.
This is simple the MSN toolbar. A resource hog
  robertv   (further information)
Apparently it is Microsoft's "Bing Bar". Runs From: C:\Program Files\MSN Toolbar\Platform\ version here \mswinext.exe. It consumes an abnormally large amount of memory, even when a browser is not in use. You can remove it from control panel- Add/Remove Programs: "Bing bar" or "MSN Toolbar". Avira Antivirus does not detect any virus' when its run/scaned.
  Dizzario   (further information)
It's from MSN toolbar. I don't need it though.
delete the bing bar in programmes and that does the trick
  Ian Mason  
Mine runs in the MSN toolbar directory
  Steve Weaver  
mswinext.exe is part of the MSN Toolbar. If mswinext.exe is giving you any problems, it is not harmful other than being a big resource hog. Go to your Control Panel, delete the MSN toolbar using Add/Remove Programs and mswinext.exe will leave with it.
mswinext.exe uses internet resources without your knowledge or control. It slows your computer down by 100 % using virtual memory and causing several Virtual Memory alert warnings. My computer virtually went into a complete stand still. I have now removed it from my PC and removed MS Win Toolbar to ensure my PC runs fast and efficiently. I have a ‘NEW’ PC since removing it! Definitely one of Bill Gates’ worst programs developed.
uses some CPU - Sysinternals autoruns,exe told me that this is started as part of Bing Bar - cannot remember I opted to install Bing Bar - deactivated Bing Bar in autoruns
Listen to Ian Mason; I followed his direction and it did do the trick!
  Nigel Campbell  
if you would prefer to keep the bing toolbar, you might choose to disable msiwinext.exe in task manager or manage add-ons. Erasing it completely may effect Internet explorer from accessing other programs. I would think it's main purpose is to gather personal information re browsing habits.
It is yet another Windoze resource hog. Use the Task Manager to end this process each session to speed up your CPU when necessary.

Rating chart

Summary: Average user rating of mswinext.exe: based on 10 votes with 13 user comments. One user thinks mswinext.exe is essential for Windows or an installed application. 6 users think it's neither essential nor dangerous. 2 users suspect danger. One user thinks mswinext.exe is dangerous and recommends removing it. 4 users don't grade mswinext.exe ("not sure about it").

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Best practices for resolving mswinext issues

A clean and tidy computer is the key requirement for avoiding problems with mswinext. 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.

To help you analyze the mswinext.exe process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

mswinext.exe [all]