What is core?

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

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

Core.sys file information

The process belongs to software core by unknown.

Description: Core.sys is not essential for Windows and will often cause problems. The file core.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 72,320 bytes (50% of all occurrences), 80,640 bytes or 72,832 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. There is no information about the author of the file. The program is not visible. There is no detailed description of this service. The file is not a Windows system file. Therefore the technical security rating is 54% dangerous, however you should also read the user reviews.

Recommended: Identify core.sys related errors

Important: Some malware camouflages itself as core.sys. Therefore, you should check the core.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

It was in my daughter's computer. Kept redirecting Web page to shopping sites. Slowed down the browser to a crawl. Almost impossible to stay on a site I wanted to be on. Was able to finally delete it by going into safemore and using AVG.
  Janet Evans  
Kann nicht deinstalliert werden. Sitzt in win32\driver ordner. Nur im safe modus oder mit pe-builder entfernbar. Schaden am system nicht ausgeschlossen. Rootkit familie?
After 4 hours searching found this core.sys as reason for several problems. Its results in formating the system.
Rootkit in der Datei core.sys gefunden.

Summary: Average user rating of core.sys: based on 4 votes with 4 user comments. 4 users think core.sys is dangerous and recommend removing it.

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Best practices for resolving core issues

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

core.sys [all]