What is razerofa.exe?

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 razerofa.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.

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Razerofa.exe file information

Windows Task Manager with razerofa
Razerofa.exe process in Windows Task Manager

The process known as Razer OFA - On-the-Fly Sensitivity Adjustment belongs to software Razer DeathAdderâ„¢ Mouse or Razer Lachesis or Razer OFA or Razer Diamondback by Razer (

Description: Razerofa.exe is not essential for the Windows OS and causes relatively few problems. Razerofa.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 163,840 bytes (54% of all occurrences), 159,744 bytes and 4 more variants. 
The program is not visible. Razerofa.exe is not a Windows system file. Therefore the technical security rating is 41% dangerous, however you should also read the user reviews.

Uninstalling this variant: You have the option to do the following:

Recommended: Identify razerofa.exe related errors

Important: Some malware camouflages itself as razerofa.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the razerofa.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

Part of Razer Diamonback drivers
Programmdatei. Unbedenklich
Razer Mouse driver
  Andy :-)  
Driver used with Razor diamondback mouse
  Alan Cain  
Software for Razer Mice
  Bill   (further information)
Part of driver for razer mice
  Daffy Duck   (further information)
Razer Diamondback Mouse ON THE FLY - Lets you change your mouse speed "on the fly" at any time without having to leave what you are doing.
Also installed with the Microsoft Nabu Mouse (Razor).
Razer Copperhead Driverpart
Driver installed with Razer products (Gaming gear: mice, keyboards, headphones

Rating chart

Summary: Average user rating of razerofa.exe: based on 12 votes with 10 user comments. 11 users think razerofa.exe is essential for Windows or an installed application. One user thinks it's probably harmless.

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Best practices for resolving razerofa issues

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

razerofa.exe [all]