What is WLSync.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 WLSync.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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WLSync.exe file information

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

The process known as Windows Live Mesh belongs to software Windows Live Essentials by Microsoft (

Description: WLSync.exe is not essential for the Windows OS and causes relatively few problems. The file WLSync.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 1,449,312 bytes (50% of all occurrences), 1,449,824 bytes or 1,448,800 bytes. 
The program has no visible window. The WLSync.exe file is digitally signed. The process starts when Windows starts (see Registry key: Run). The WLSync.exe file is not a Windows system file. It can change the behavior of other programs or manipulate other programs. WLSync.exe is able to record keyboard and mouse inputs. Therefore the technical security rating is 60% dangerous.

Uninstalling this variant: You can uninstall the program Windows Live Essentials, update it, or ask Customer Support for help. Go to to update it, go to for support, or go to Windows Live Essentials in Windows Control Panel (Software or Programs section) to uninstall it.

Recommended: Identify WLSync.exe related errors

Important: Some malware camouflages itself as WLSync.exe. Therefore, you should check the WLSync.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.


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Best practices for resolving WLSync issues

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

WLSync.exe [all]