What is sxs.dll?

The genuine sxs.dll file is a software component of Microsoft Windows Operating System by Microsoft.
"sxs.dll" is a Windows Operating System file that is required for the OS to function. The file maintains a log of information related to manifest files. It basically supplies necessary data to handle binding and activation processes within each manifest. The file provides libraries, COM classes, etc. that was often stored within the registry and the manifest depends on the "sxs.dll" library in order to function properly. Oftentimes, when you receive an sxs.dll error; it is usually due to another corrupt or missing file utilized by this DLL file. For any installation that requires access or control to protected Windows files, "sxs.dll" forwards the needed information to the manifest in order to allow administrator privileges. "sxs.dll" not only works with single assemblies, but also handles side by side assemblies. Microsoft is known for their long list of designed operating systems, as well as their huge database of software. As a leader in technological information, the company is widely used across the globe for networking, operating systems, hardware, and security.

SxS stands for Side x Side

Sxs.dll is a Windows DLL file. DLL is the abbreviation for Dynamic Link Library. DLL files are needed by programs or web browser extensions, because they contain program code, data, and resources. The following information can help you determine if sxs.dll is a Windows system file or if it belongs to an application that you can trust.

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Sxs.dll file information

The process known as Fusion 2.5 belongs to software Microsoft Windows Operating System by Microsoft (

Description: Sxs.dll is not essential for the Windows OS and causes relatively few problems. The sxs.dll file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 747,520 bytes (60% of all occurrences), 714,240 bytes, 380,928 bytes, 738,816 bytes or 878,080 bytes. 
A .dll file (Dynamic Link Library) is a special type of Windows program containing functions that other programs can call. This .dll file can be injected to all running processes and can change or manipulate their behavior. It can change the behavior of other programs or manipulate other programs. The program is not visible. There is no detailed description of this service. Sxs.dll is not a Windows core file. Therefore the technical security rating is 60% dangerous.

Recommended: Identify sxs.dll related errors

Important: Some malware camouflages itself as sxs.dll. Therefore, you should check the sxs.dll 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 sxs issues

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

sxs.dll [all]