What is SLEE503.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the SLEE503.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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SLEE503.exe file information

Windows Task Manager with SLEE503
SLEE503.exe process in Windows Task Manager

The process known as SLEE503.exe belongs to software Steganos Secure FileSharing by Steganos GmbH (

Description: SLEE503.exe is not essential for the Windows OS and causes relatively few problems. The SLEE503.exe file is located in the C:\Windows\System32 folder. The file size on Windows 10/8/7/XP is 40,960 bytes. 
There is no description of the program. The program has no visible window. It is not a Windows core file. SLEE503.exe is located in the Windows folder, but it is not a Windows core file. Therefore the technical security rating is 68% dangerous, however you should also read the user reviews.

Uninstalling this variant: You can uninstall the associated program (Start > Control Panel > Uninstall a Program > Steganos Secure FileSharing).

Recommended: Identify SLEE503.exe related errors

Important: Some malware disguises itself as SLEE503.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the SLEE503.exe 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

Steganos Live Encryption Engine from the sofware package 'Steganos Security Suite 6'
  Ambassadeur   (further information)
It cames with Steganos security Filesharing v.6.0
  Emy Mill  
Do not terminate it then steganos safe wont open
  Tejas a.K.a LiNkMaStA  
Part of Steganos Security Suit - If you turn it of, then your Safe or Password Manager wont work.
my PC with Avira blocked, remname as jpg and then delete

Rating chart

Summary: Average user rating of SLEE503.exe: based on 13 votes with 5 user comments. 11 users think SLEE503.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user suspects danger. One user is not sure about it.

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Best practices for resolving SLEE503 issues

A clean and tidy computer is the key requirement for avoiding problems with SLEE503. 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 SLEE503.exe 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

SLEE503.exe [all]