What is OCHelper.dll?

OCHelper.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 Microsoft Lync.

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

OCHelper.dll file information

The process known as Microsoft Lync (version 2010) or Skype for Business

belongs to software Microsoft Office (version 2013, 365 ProPlus - en-us, 32-bit Components 2013, 365 - en-us, 365 Small Business Premium, 365 Business - en-us, 2016, 365 Home Premium - en-us, 365 ProPlus - nb-no, 365 ProPlus - ru-ru, 365 ProPlus - nl-nl) or Microsoft Office Professional Plus (version 2013, 2016, 2010) or Microsoft Office Shared (version 64-bit Setup, 64-bit MUI 2013, 64-bit MUI) 2013) or Microsoft Lync MUI (version 2013) or Microsoft Office Professional or Microsoft Visio Professional (version 2016 - en-us) or Microsoft Office Home and Student (version 2013) or Microsoft Lync (version 2010)

by Microsoft (

Description: OCHelper.dll is not essential for the Windows OS and causes relatively few problems. OCHelper.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 153,248 bytes (41% of all occurrences), 153,768 bytes and 30 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 31D09BA0-12F5-4CCE-BE8A-2923E76605DA. The program is not visible. The file is able to change the behavior of, or monitor Internet Explorer. The file is digitally signed. The file is not a Windows system file. Therefore the technical security rating is 35% dangerous, however you should also read the user reviews.

Uninstalling this variant: If there are any problems with OCHelper.dll, you can uninstall the program using the Control Panel ⇒ Uninstall a ProgramMicrosoft Lync or Skype for Business or contact Customer Service.

Recommended: Identify OCHelper.dll related errors

If OCHelper.dll is located in the Windows folder for temporary files, the security rating is 58% dangerous. The file size is 26,768 bytes. There is no information about the author of the file. It can change the behavior of other programs or manipulate other programs. The program has no visible window. OCHelper.dll is a Verisign signed file. The file has a digital signature. The service has no detailed description. The OCHelper.dll file is not a Windows system file. OCHelper.dll is able to record keyboard and mouse inputs and monitor applications.

Uninstalling this variant: If there are any problems with OCHelper.dll, you can uninstall the program using the Control Panel ⇒ Uninstall a ProgramSearch App or contact Customer Service.

Important: Some malware camouflages itself as OCHelper.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the OCHelper.dll process on your PC to see if it is a threat. If Microsoft Lync 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.


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Best practices for resolving OCHelper issues

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

Other processes

OCHelper.dll [all]