What is BIOSEvent.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 BIOSEvent.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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BIOSEvent.exe file information

Windows Task Manager with BIOSEvent
BIOSEvent.exe process in Windows Task Manager

The process known as BIOSEvent.exe belongs to software Latitude ON Reader by CyberLink (

Description: BIOSEvent.exe is not essential for the Windows OS and causes relatively few problems. The BIOSEvent.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 110,592 bytes (77% of all occurrences) or 116,008 bytes. 
The process has no file description. The program is not visible. The process is loaded during the Windows boot process (see Registry key: MACHINE\Run). The BIOSEvent.exe file is not a Windows system file. Therefore the technical security rating is 58% dangerous.

Uninstalling this variant: If you still experience problems with BIOSEvent.exe, you can uninstall Latitude ON Reader from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify BIOSEvent.exe related errors

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


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Best practices for resolving BIOSEvent issues

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

BIOSEvent.exe [all]