What is swenum?

The genuine swenum.sys file is a software component of Microsoft Windows XP, Vista, 7, or 8 by Microsoft.
This is a highly important Windows driver file, part of enabling software to communicate with hardware. It helps applications running under Windows do "device enumeration," which is usually their very first task: detecting how many devices are on the system and setting up data structures about the drivers and other device-specific information. If it is corrupted or damaged, a critical system error, (STOP error), can result. These are often called "BSOD" errors, ("blue screen of death"). Such errors most often happen after installing new hardware or software. They can happen during program installation, or while software related to this file is running, while loading a Microsoft driver, or while Windows is starting or shutting down. It is critical to troubleshooting the problem to make note of when and where a BSOD error occurs. Some malware uses the name of this file to disguise itself; if the program is not in the folder C:\Windows\System32\drivers, it is suspect.

SwEnum stands for Plug and Play Software Device Enumerator

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

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

Swenum.sys file information

The process known as Plug and Play Software Device Enumerator or Software Bus Driver belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original swenum.sys is an important part of Windows and rarely causes problems. The swenum.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 4,352 bytes (66% of all occurrences), 12,240 bytes, 12,776 bytes or 4,096 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The service has no detailed description. The file is a trustworthy file from Microsoft. swenum.sys appears to be a compressed file. Therefore the technical security rating is 6% dangerous, however you should also read the user reviews.

Uninstalling this variant: There is a possibility to uninstall the associated program (Start > Control Panel > Uninstall a Program > Microsoft Windows) or consult Microsoft's Customer Service.

Recommended: Identify swenum.sys related errors

If swenum.sys is located in a subfolder of C:\Windows\System32, the security rating is 20% dangerous. The file size is 17,760 bytes. Swenum.sys is a Microsoft signed file. The program has no visible window. The service has no detailed description. The file is not a Windows system file. swenum.sys appears to be a compressed file.

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

swenum.sys is Microsoft Windows PnP software device enumerator.

Summary: Average user rating of swenum.sys: based on 6 votes with 1 user comment. 6 users think swenum.sys is essential for Windows or an installed application.

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Best practices for resolving swenum issues

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

swenum.sys [all]