What is sr?

The genuine sr.sys file is a software component of Microsoft Windows Operating System by Microsoft.
A key driver for Microsoft System Restore, this file will be present in the background when restore points are being set. System Restore is a feature introduced with Windows XP that creates restore points at various times. A restore point is a specific date and time that the computers key system settings are saved. Once a restore point is created, the settings on a system can be restored back to any one of the restore points. Founded in 1975 in New Mexico, Microsoft is now one of the largest software corporations in the world. Currently headquartered in Washington, the flagship Windows operation system is the most utilized OS in the world.

SR stands for System Restore Filesystem Filter Driver

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

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

Sr.sys file information

The process known as System Restore Filesystem Filter Driver or System Restore Filter Driver belongs to software Microsoft Windows Operating System or Filtertreiber für Systemwiederherstellung by Microsoft (

Description: The original sr.sys is an important part of Windows and rarely causes problems. The sr.sys file is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 73,472 bytes (92% of all occurrences) or 70,400 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. Sr.sys is a Windows system file. The program is not visible. It is a Microsoft signed file. There is no detailed description of this service. sr.sys appears to be a compressed file. Therefore the technical security rating is 3% dangerous; however you should also read the user reviews.

Recommended: Identify sr.sys related errors

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

Microsoft System Restore

Summary: Average user rating of sr.sys: based on 2 votes with 1 user comment. One user thinks sr.sys is essential for Windows or an installed application. One user thinks it's probably harmless.

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Best practices for resolving sr issues

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

sr.sys [all]