What is jqs.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 jqs.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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Jqs.exe file information

Windows Task Manager with jqs
Jqs.exe process in Windows Task Manager

The process known as Java Quick Starter Service or Java Quick Starter belongs to software Java™ Platform (version SE 6, SE 7, SE 8) or Java SE Runtime Environment (version 7, 6) or Java 7 or Java (version 6) or IBM Developer Kit for Windows,Java by Sun Microsystems ( or Oracle ( or Oracle America or IBM (

Description: Jqs.exe is not essential for Windows and will often cause problems. Jqs.exe is located in a subfolder of "C:\Program Files (x86)" or sometimes in a subfolder of the user's "Documents" folder—for example C:\Program Files (x86)\Java\jre7\bin\. Known file sizes on Windows 10/8/7/XP are 153,376 bytes (54% of all occurrences), 182,696 bytes and 23 more variants. 
It runs as service JavaQuickStarterService in the background.
The program has no visible window. Jqs.exe is not a Windows system file. The program listens for or sends data on open ports to a LAN or the Internet. It is a Verisign signed file. The jqs.exe file is certified by a trustworthy company. Jqs.exe is able to monitor applications. Therefore the technical security rating is 43% dangerous, but you should also take into account the user reviews.

Uninstalling this variant: If you experience any issues with installation of jqs.exe, you can safely remove the program using the uninstall program of Java(TM) 6 Update or Java Web Start (Control Panel ⇒ Uninstall a Program), use the software publisher’s support or make sure that you have installed the latest version.

Recommended: Identify jqs.exe related errors

Important: Some malware camouflages itself as jqs.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example TROJ_SPNR.15L611 (detected by TrendMicro), and Spyware.007Spy (detected by Symantec). Therefore, you should check the jqs.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

seems to block Java from updating
Java stuff
Useful for WindowsXP when the system requires quick-start access to Java operability. That's what JQS means: Java Quick Start! It was added to Java in release Java SE 6 update 10. Not harmful but probably pretty pointless for Windows7 and above, as these newer systems come with their own Java prefetch anyhow. On WindowsXP, if you're tight for CPU cycles or the extra 20MB RAM just deactivate it... START CONTROL PANEL (you might need to "Switch to classic view" in the top-left) JAVA (click on the icon) ADVANCED (click on the tab) MISCELLANEOUS (you'll need to scroll down) JAVA QUICK STARTER ...simply uncheck the box! You may want to restart your system once this has been done, just to be clear. Hope this helps any confusion and makes you feel safer about this JQS.EXE file. It's not harmful, just a bit of a performance drag if you're not on the web.
  Mike Graham   (further information)
Another automatic annoyance, but seems little more than that. Any Java update/upgrade will bring it back, and you have to go kill it again from the autostarts and Java controls and Explorer autoloads.
jqs.exe is the Java quick starter. It doesn't do much harm, but it does access the disks a lot. How to disable jqs.exe for all users of a computer: Press the Windows and R keys at the same time to bring up the Run command (or click ‘Start’ and then click ‘Run’) Type services.msc and press OK to load the Services configuration window Scroll down the list of services until you find ‘Java Quick Starter’ and then double click it to open the Java Quick Starter Properties window In the General tab, change the ‘Startup type’ from ‘Automatic’ to ‘Disabled’ then press the OK button Close the Services window – after you next restart your computer jqs.exe will be disabled and will no longer run, whereas doing this via control panel doesn't always work.
  timtjtim   (further information)
According to Oracle and, Java Quick Starter pre-loads about 20Mb of files in memory, which makes Java start-up considerably faster. If you visit web pages that use Java -- like many games, multimedia sites, etc., such as RuneScape or the U.S. government's official time page -- jqs.exe will help these pages and applets load much faster.
  EnosEugenius   (further information)
Also, this link will tell you how to disable JQS, if you really want to -- if you are running on Windows Vista/7/8 (or better, in the future), these versions of Windows have their own pre-loader for Java and other programs; however, Windows XP and 2000 benefit a great deal from JQS, and it doesn't take up very much space, so I'd recommend letting it run.
  EnosEugenius   (further information)
stepped into a smelly exe, and next thing I see is a brand new jqs.exe hitting 95% cpu. Removing it seems hard. Removed Java altogether, disabled java browser plugins, removed all related files.. Keeps coming back. Quiet when network is disabled, very busy when not. Do not know about your file, but mine is definitely a virus. 1.114.112 bytes on disk.
More comments can be found here:
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Rating chart

Summary: Average user rating of jqs.exe: based on 39 votes with 9 reviews. 18 users think jqs.exe is essential for Windows or an installed application. 4 users think it's probably harmless. 6 users think it's neither essential nor dangerous. 5 users suspect danger. 6 users think jqs.exe is dangerous and recommend removing it. 4 users don't grade jqs.exe ("not sure about it").

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Best practices for resolving jqs issues

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

jqs.exe [all]