84,488,480 programs installed

Should I remove QNAP Qsync Client?

What percent of users and experts removed it?
4% remove it96% keep it
Overall Sentiment
What do people think about it?
Be the first to rate (click star to rate)
How common is it?
Global Rank #20,850
United States Rank #18,863
Reach 0.0101%


VersionDistribution 0.50% 0.50% 13.07% 11.56% 2.01% 0.50% 1.01% 3.02% 4.52% 7.54% 2.51% 0.50% 8.54% 10.55% 19.10% 6.53% 5.03% 3.02%

QNAP Qsync Client


QNAP Qsync Client is a program developed by QNAP Systems. The most used version is, with over 98% of all installations currently using this version. Upon installation and setup, it defines an auto-start registry entry which makes this program run on each Windows boot for all user logins. The software is designed to connect to the Internet and adds a Windows Firewall exception in order to do so without being interfered with. When installed, it will add a context menu handler to the Windows shell in order to provide quick access to the program. The main program executable is qsync.exe. The software installer includes 13 files and is usually about 1.45 MB (1,517,949 bytes). In comparison to the total number of users, most PCs are running the OS Windows 10 as well as Windows 7 (SP1). While about 47% of users of QNAP Qsync Client come from the United States, it is also popular in Italy and Germany.

Program detailsProgram details

Installation folder: C:\Program Files\qnap\qsync
Uninstaller: C:\Program Files\QNAP\Qsync\uninstall.exe
Estimated size: 1.45 MB

Program filesFiles installed by QNAP Qsync Client

Program executable:qsync.exe
Name:Qsync Client
Qsync Client Application
Path:C:\Program Files\qnap\qsync\qsync.exe
Additional files:
  • QFile.dll - Qsync (Qsync QFile Library)
  • Qsync.dll - Qsync sync Library
  • QsyncExt.dll - QsyncExt Module
  • uninstall.exe - Qsync Installer
  • IOTCAPIs.dll
  • P2PTunnelAPIs.dll
  • RdiffDll.dll
  • RDTApis.dll

Program behaviorsBehaviors exhibited

Context Menu Handler
  • QsyncExt.dll added to Windows Explorer under the name 'QsyncExt' with a class of {9EF65B94-EC0D-49F7-B46D-006B388EB03E}.
Scheduled Task (Boot/Login)
  • Qsync.exe is automatically launched at startup through a scheduled task named Qsync_Reg_HKLMWow6432Run.
Startup File (User Run)
  • Qsync.exe is loaded in the current user (HKCU) registry as an auto-starting executable named 'Qsync' and executes as "C:\Program Files\QNAP\Qsync\Qsync.exe" /launch_qsync.
Startup File (User Run Once)
  • Qsync.exe is loaded once in the current user (HKCU) registry as a startup file name 'Application Restart #2' which loads as C:\Program Files\QNAP\Qsync\Qsync.exe /launch_qsync /RestartByRestartManageC:8DA44956-94D8-4df0-BC6C-00EEE806C000 /RestartByRestartManageC:A91BC1B2-A7F3-4d32-9930-5B9128070451 /RestartByRestartManager.
Startup File (All Users Run)
  • Qsync.exe is loaded in the all users (HKLM) registry as a startup file name 'Qsync' which loads as "C:\Program Files\QNAP\Qsync\Qsync.exe" /launch_qsync.
Windows Firewall Allowed Program
  • Qsync.exe is added as a firewall exception for 'C:\Program Files\QNAP\Qsync\Qsync.exe'.

How do I remove QNAP Qsync Client?

You can uninstall QNAP Qsync Client from your computer by using the Add/Remove Program feature in the Window's Control Panel.
  1. On the Start menu (for Windows 8, right-click the screen's bottom-left corner), click Control Panel, and then, under Programs, do one of the following:
    • Windows Vista/7/8/10: Click Uninstall a Program.
    • Windows XP: Click Add or Remove Programs.
  2. When you find the program QNAP Qsync Client, click it, and then do one of the following:
    • Windows Vista/7/8/10: Click Uninstall.
    • Windows XP: Click the Remove or Change/Remove tab (to the right of the program).
  3. Follow the prompts. A progress bar shows you how long it will take to remove QNAP Qsync Client.

Win 10 83%
Win XP 1%
Automatically starts? Yes
(Found in the run registry)
Uninstall it 4%
Keep it 96%

Windows OS versionsWindows

Which Windows OS versions does it run on?
Windows 10 83.42%
Windows 7 16.08%
Windows XP 0.50%
Which OS releases does it run on?
Windows 10 Pro 45.73%
Windows 10 Home 29.65%
Windows 7 Professional 8.04%
Windows 7 Ultimate 3.52%
Windows 7 Home Premium 3.52%
Windows 8.1 Pro 2.51%

Distribution by countryGeography

46.56% of installs come from the United States
Which countries install it?
  United States 46.56%
  Italy 12.55%
  Germany 8.91%
  France 4.45%
  Netherlands 3.64%
  United Kingdom 3.64%
  Switzerland 2.02%
  Australia 2.02%
  Poland 2.02%
  Taiwan 1.21%
  Finland 1.21%
  Austria 1.21%
  Spain 1.21%
  Canada 1.21%

OEM distributionPC manufacturers

What PC manufacturers (OEMs) have it installed?
Hewlett-Packard 28.30%
ASUS 16.98%
Dell 14.15%
Lenovo 9.43%
Acer 8.49%
Medion 4.72%
Samsung 4.72%
Intel 2.83%
Common models
ASUS All Series 7.21%
Notebook W35xSS_370... 1.80%
Gigabyte GA-880GA-UD3H 1.80%
HP Pavilion dv7 Notebook ... 1.80%
LENOVO 80N4 1.80%
HP EliteBook 8560w 1.80%

About (from QNAP Systems, Inc.)

QNAP, Inc.
Publisher URL: www.qnap.com


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