What is oahlp64?

Oahlp64.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if oahlp64.sys is a Windows system file or if it belongs to an application that you can trust.

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Oahlp64.sys file information

The process known as Online Armor helper driver belongs to software unknown by Emsi Software GmbH ( or Emsisoft GmbH.

Description: Oahlp64.sys is not essential for the Windows OS and causes relatively few problems. The oahlp64.sys file is located in a subfolder of C:\Windows. Known file sizes on Windows 10/8/7/XP are 54,896 bytes (50% of all occurrences), 62,016 bytes or 56,648 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. There is no description of the program. The program is not visible. The file is digitally signed. There is no detailed description of this service. The file is not a Windows core file. Some people think it is not dangerous. Oahlp64.sys is a Verisign signed file. oahlp64.sys appears to be a compressed file. Therefore the technical security rating is 7% dangerous, however you should also read the user reviews.

Recommended: Identify oahlp64.sys related errors

Important: Some malware camouflages itself as oahlp64.sys. Therefore, you should check the oahlp64.sys 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

component of Online Armor firewall
  meetoo   (further information)
part of Online Armor firewall
  meetoo   (further information)
well-known firewall (Online Armor) driver
  meetoo   (further information)

Summary: Average user rating of oahlp64.sys: based on 3 votes with 3 user comments. 3 users think oahlp64.sys is essential for Windows or an installed application.

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Best practices for resolving oahlp64 issues

A clean and tidy computer is the key requirement for avoiding problems with oahlp64. 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 oahlp64.sys 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

oahlp64.sys [all]