What is pxbho.dll?

Pxbho.dll is a browser extension for Internet Explorer. This add-on enables several additional functions for Internet Explorer. You can disable it through the Extras menu (key combination Alt + X) under Manage Add-ons. The following paragraph provides more information about Prevx Malicious URL Detector.

Click to Run a Free Scan for pxbho.dll related errors

Pxbho.dll file information

The process known as Prevx Malicious URL Detector belongs to software Prevx Malicious URL Detector or Prevx 2.0 Agent or Prevx1 by Prevx (

Description: Pxbho.dll is not essential for the Windows OS and causes relatively few problems. Pxbho.dll is located in a subfolder of the user's profile folder. The file size on Windows 10/8/7/XP is 90,112 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 55EA1964-F5E4-4D6A-B9B2-125B37655FCB. The program is not visible. It is able to change the behavior of, or monitor Internet Explorer. The pxbho.dll file is not a Windows system file. Therefore the technical security rating is 53% dangerous, however you should also read the user reviews.

Uninstalling this variant: If problems with Prevx 2.0 Agent or Prevx1 occur, you can turn to the software developer, Prevx, for advice, update to a possibly corrected version or uninstall the associated program (Start > Control Panel > Uninstall a Program ).

Recommended: Identify pxbho.dll related errors

Important: Some malware camouflages itself as pxbho.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the pxbho.dll process on your PC to see if it is a threat. If Prevx Malicious URL Detector 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 ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

very good malware resident & on-demand scanner - essential on top of AV (Avast or NOD32) & a Firewall (Kerio or Sygate)
  Shayne Micchia  
Prevx Malware scanner... (It is GOOD for you)
  Richard B   (further information)
Googled a strange file PAQX.EXE (not active but just sitting in the temp dir) then even eraser could not get rid of it. The only web site to have a report was Prevx so downloaded their "free" malware check. wich has some great testimonials
  Jart   (further information)

Summary: Average user rating of pxbho.dll: based on 4 votes with 3 user comments. 3 users think pxbho.dll is essential for Windows or an installed application. One user thinks pxbho.dll is dangerous and recommends removing it.

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Best practices for resolving pxbho issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active pxbho process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the pxbho.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.

Other processes

pxbho.dll [all]