What is bowser?

The genuine bowser.sys file is a software component of Microsoft Windows Operating System by Microsoft.
A driver for Windows NT, this system file supports the NT Lan Manager Datagram Receiver. It allows your NT workstation to communicate with the Datagram Receiver hardware. Windows NT was the first robust server platform made available by the Windows Operating System. Founded in 1975, Microsoft's flagship product is the Windows operating system, which is installed on over 90% of workstations worldwide.

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

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

Bowser.sys file information

The process known as NT Lan Manager Datagram Receiver Driver belongs to software Microsoft Windows Operating System or Pilote de prise en charge du navigateur by Microsoft (

Description: The original bowser.sys is an important part of Windows and rarely causes problems. The bowser.sys file is located in the C:\Windows\System32\drivers folder. The file size on Windows 10/8/7/XP is 69,632 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. Bowser.sys is a Windows system file. Bowser.sys is a Microsoft signed file. The program has no visible window. bowser.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous, however you should also read the user reviews.

Recommended: Identify bowser.sys related errors

Important: Some malware disguises itself as bowser.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the bowser.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

jede zweite datei wird bei ihnen als Ansteuerung von Grafikkarte oder Drucker verwendet... keine normale aussage , dann lassen sie es lieber
In my OS (Win7), bowser.sys is 122880 bytes.Its path is c:\systemroot\system32\bowser.exe .I find that suspect.

2 users don't grade bowser.sys ("not sure about it").

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Best practices for resolving bowser issues

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

bowser.sys [all]