What is SLsvc.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 SLsvc.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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SLsvc.exe file information

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

The process known as Microsoft Software Licensing Service or Microsoft-Softwarelizenzierungsdienst belongs to software Microsoft Windows Operating System or Betriebssystem Microsoft Windows by Microsoft (

Description: The original SLsvc.exe is an important part of Windows and rarely causes problems. The SLsvc.exe file is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 3,408,896 bytes (46% of all occurrences), 2,623,488 bytes, 2,605,568 bytes or 2,592,256 bytes. 
The SLsvc.exe file is a Windows system file. The program has no visible window. The file is a Microsoft signed file. Therefore the technical security rating is 4% dangerous, however you should also read the user reviews.

Recommended: Identify SLsvc.exe related errors

If SLsvc.exe is located in the C:\Windows folder, the security rating is 50% dangerous. The file size is 10,240 bytes. The SLsvc.exe file is an unknown file in the Windows folder. The program is not visible. The file is not a Windows system file.

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

windows services for spooling/ gynocrypt actions and is not an exe. file
Interferes with Win8 x64 network driver (running torrent) and causes ndis to crash.
Controle Panel does not work without this. Printer does not work. Must validate Windows. Get another error messages.
it's about NetLimiter software..
MS's Genuine Advantage service.
It's in the System32 file: not dangerous.
Vista version of spyware
Windows Vista licensing. The process forcefully gives private system information to Microsoft without user consent, and is used by Microsoft to disable operating systems. This can be considered an 'official virus / trojan' and is very dangerous, but Vista can't be ran without it.
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of SLsvc.exe: based on 30 votes with 9 reviews. 19 users think SLsvc.exe is essential for Windows or an installed application. 5 users think it's probably harmless. 3 users think it's neither essential nor dangerous. One user suspects danger. 2 users think SLsvc.exe is dangerous and recommend removing it. 2 users don't grade SLsvc.exe ("not sure about it").

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Best practices for resolving SLsvc issues

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

SLsvc.exe [all]