What is beep?

Beep.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 beep.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for beep drivers in need of updating

Beep.sys file information

The process known as BEEP Driver belongs to software Microsoft Windows Operating System or Beep by Microsoft (

Description: The original beep.sys is an important part of Windows and rarely causes problems. The file beep.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 4,224 bytes (67% of all occurrences), 6,144 bytes, 27,648 bytes, 28,160 bytes or 29,184 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The beep.sys file is a Windows core system file. The program is not visible. The service has no detailed description. The beep.sys file is a Microsoft signed file. beep.sys appears to be a compressed file. Therefore the technical security rating is 2% dangerous, however you should also read the user reviews.

Recommended: Identify beep.sys related errors

Important: Some malware camouflages itself as beep.sys, for example Hacktool.Rootkit (detected by Symantec), and Backdoor.Win32.UltimateDefender.a (detected by Kaspersky). Therefore, you should check the beep.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

this is used to make the system speaker go BEEP whenever an application requests it, or when an error message poppes up but you don;t have a sound card installed to hear the default ploing sound.
i deleted it from some kid's computer and i dont think it works anymore
it goes "beep beep"
  Tyrone Biggums  
Beep.sys is the driver for the beep installed in the computer, some computers its has adjustable volume, others it just loud.
This file generate bips for ms-dos, and is not dangerous, but a system file. Try it launching cmd.exe and write: "echo " then press Ctrl+G and press Enter. Never delete this file. It is used when you haven't got any drivers for sound. It is a non-plug-and-play peripheral and a system service.
Beeping can be disabled from Device Manager, to find it select Device Manager to show all hidden drivers, it is under plug and play
PC speaker driver
should be about 4.1 kB, but i found a much larger file there. i replaced it with windows' original copy (from windows xp cd), and the system kept running fine.
My symantec antivirus keep seeing it as a threat
I've deleted it, and that echo ^G still causes a beep.
It prevented Windows XP from booting up. The diagnostic screen told me to disable or remove any newly installed hardware or software. And/Or disable BIOS memory options such ascaching or shadowing, using,if necessary, the F8 Safe Mode operation. I don't know how to do this so I will probably take it in to a computer service shop.
Beep.sys can be infected. Buretos.exe depends on it to keep you infected.
  Phil Allbright  
personally got sick and tired of system beeps and disabled the driver in device manager this will cause no detrimental effects to your machine so enjoy the silence. unfortnatly this does nothing to stop the bios from beeping it's heart out durring post
it's system file not to be confused with ANY sound file. charisteristics of this file are hidden, but it is a building block for an Operating system to function correctly .
if a program call for it and it is not installed, the os can crash
  richard a clark  

Rating chart

Summary: Average user rating of beep.sys: based on 15 votes with 15 user comments. 10 users think beep.sys is essential for Windows or an installed application. 3 users think it's probably harmless. One user thinks it's neither essential nor dangerous. One user suspects danger. 3 users don't grade beep.sys ("not sure about it").

Do you have additional information?
What do you know about beep.sys:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving beep issues

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

To help you analyze the beep.sys process on your computer, the following programs have proven to be helpful: ASecurity 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. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

beep.sys [all]