What is Sync.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 Sync.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.

Click to Run a Free Scan for Sync.exe related errors

Sync.exe file information

The process known as ClockSync or OZ/ZQ-590A Synchronization Software or PIM MFC Application

belongs to software ClockSync or OZ/ZQ-590A Synchronization Software or PIM Application

by New IT Solutions ( or SPAMfighter ApS ( or SHARP (

Description: Sync.exe is not essential for Windows and will often cause problems. The Sync.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 115,200 bytes (50% of all occurrences), 270,336 bytes, 4,186,104 bytes, 655,360 bytes or 442,408 bytes. 
It is not a Windows system file. There is no information about the author of the file. The program starts upon Windows startup (see Registry key: Run, MACHINE\User Shell Folders). Sync.exe is able to record keyboard and mouse inputs, connect to the Internet and monitor applications. Therefore the technical security rating is 36% dangerous, however you should also read the user reviews.

Uninstalling this variant: If problems with Sync.exe come up, you can also uninstall the software ClockSync or 4shared Sync using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify Sync.exe related errors

External information from Paul Collins:

Important: Some malware also uses the file name Sync.exe, for example not-a-virus:AdWare.Win32.SaveNow.v (detected by Kaspersky), and Adware:Win32/WhenU.C (detected by Microsoft). Therefore, you should check the Sync.exe process on your PC to see if it is a threat. If ClockSync has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

google says its spyware ..
i have oz-590a and i think it will be useful for me
This is part of a Sharp (brand name) pocket organizer. This allows you to synchonize your Outlook items to the organizer. It is not dangerous.
SPYWARE! detected by avast 4.8 pro

Summary: Average user rating of Sync.exe: based on 5 votes with 4 user comments. One user thinks Sync.exe is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous. One user suspects danger. One user thinks Sync.exe is dangerous and recommends removing it.

Do you have additional information? Help other users!
What do you know about Sync.exe:
How would you rate it:
Link for more info:
Your Name:

Best practices for resolving Sync issues

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

Sync.exe [all]