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Monday, May 04, 2009

What is the process JQS.exe and how to easily disable JQS.exe?

This morning I noticed a lot of activity going on my PC, even at times when it was idle. I just got curious to find out what the reason could be in the strange activity on my computer. Well, like any other tech geek - I first pulled up the Windows Task Manager (hitting Ctrl Alt Del keys at once). I noticed a strange process called JQS.exe and also found that JQS.exe was running on low priority. But interestingly this strange process called JQS.exe was using 1.3 MB of computer memory and almost 2 MB of virtual memory. Also, there was a lot of activity by this process at random since it was initiating too many I/O read processes.

Well, I figured out that JQS.exe was not any virus process but was indeed Java Quick Start which was actually designed to reduce the startup time of Java applets
and Java apps by prefetching Java Runtime Environment files frequently into memory and caching it. But I'm not a person who uses Java Applets or Java Apps that often - I hardly use Java related stuff maybe once in 2-3 weeks, so there is absolutely no use for it to run all the time on my box to make a rare use app work faster!!

So here is how you can easily disable JQS.exe :
  • Goto the Control Panel (Start > Control Panel).
  • Double click the Java icon to open the Java Control Panel.
  • Now click on the Advanced option
  • Goto Miscellaneous and you will find that Java Quick Start has been enabled.
  • Uncheck the box to disable the JQS.exe process.
You can now see that JQS.exe has disappeared from the Task Manager.


  1. Anonymous said,

    Thanks, even i was facing the same hurdle and now i know how to jump over the same

    on 5/14/2009 9:25 AM

  2. Gedme said,

    Thank you!

    on 7/02/2009 7:33 PM

  3. Don Tai said,

    Thanks for the clear and concise instructions. Most importantly it worked! Keep up the good work.

    on 8/21/2009 11:27 AM

  4. Anonymous said,

    Thank you I had the same problem.. now its gone..

    on 8/26/2009 12:13 AM

  5. Anonymous said,


    on 8/26/2009 10:47 AM

  6. Anonymous said,

    Sweet! Thanks so much.

    on 9/04/2009 1:47 AM

  7. Anonymous said,

    Thanks! I had been meaning to look it up. Glad that you did and also found the solution.

    on 9/04/2009 4:33 AM

  8. Anonymous said,

    Must be admin or use runas admin to even see this

    on 9/05/2009 12:48 AM

  9. Rob Garrison said,

    Thanks so much for the information. Lots of other sites tell what it is but don't give any idea how to stop it.

    on 9/25/2009 7:51 PM

  10. Anonymous said,

    Thank you, simple instructions which work.

    on 10/21/2009 3:08 PM

  11. Bitrunner said,

    You're Kung Fu is strong. You are obviously no stranger to the way of the ninja.

    on 11/05/2009 5:42 AM

  12. Anonymous said,

    thanks alot...just removing some process that i don't need...good day

    on 11/15/2009 7:54 PM

  13. Galaxy Express 999 said,

    Just wanted to say thanks a bunch for the help. You're great! :)

    on 11/17/2009 2:50 AM

  14. Anonymous said,

    Even though you might not use Java DIRECLTY .. a lot of Apps and Web sites use Java ..
    So your TIP isn't very good imo and I would keep the process running ..

    on 11/20/2009 8:20 AM

  15. Anonymous said,

    Thank you
    I hate intrusive software

    on 12/12/2009 4:18 AM

  16. Peter in Boston, MA USA said,

    Namaste' and thank you very very much. You were 100% correct in your assessment and your solution worked perfectly. I appreciate your help. Have a wonderful day and Happy New Year!


    on 12/14/2009 7:51 PM

  17. Anonymous said,

    Everyone who uses the internet uses java 90% of the time even if they do not relize it . Evfery cookie online from sites you visit uses java . If you remove java you may find surfing online to be a bit tougher than normal .

    on 1/01/2010 2:54 PM

  18. Anonymous said,

    Everything on my machine started running very very very slow that last couple of days. Like you, I looked in the task manager and saw jqs.exe - a process that I never noticed before. It wasn't taking a huge amount of CPU and it didn't appear to take a lot of memory. I used your solution to see what would happen, and my machine came back to life. Thanks so much for posting this helpful tip.

    Also, for the previous poster who suggests that Java won't run without jqs.exe, that is not correct.

    on 1/21/2010 10:21 PM

  19. Anonymous said,

    Excellent tip! Much thanks!

    on 2/01/2010 12:35 PM

  20. Anonymous said,

    Thanks for the info. I just noticed that JQS was causing a huge amount of disk I/O over time on one of my management servers -- several orders of magnitude greater than any other process. Like you, I was surprised because I rarely run any Java apps.

    Sun needs to take a closer look at what JRE is doing to cause so much unnecessary overhead.

    on 2/05/2010 12:18 AM

  21. Anonymous said,

    thanx buddy

    on 2/09/2010 12:57 AM

  22. Anonymous said,

    Thanks! your post came up first in Google.

    on 2/11/2010 11:34 AM

  23. Anonymous said,

    jqs.exe still runs but hardly does anything so I kill it in task manager.

    on 2/15/2010 12:01 AM

  24. Anonymous said,

    Wow Thanl you so much Man! you saved my day, the computer is starting faster than before.

    Thank you once again, hehe greetings bro!

    on 2/15/2010 7:05 AM

  25. Heather said,

    it didn't work for me -- that box was already disabled in the options but jqs.exe is showing in task mgr. I unchecked the Auto Update feature to see if that would do it but no luck. if anyone has any other suggestions let me know, thx!

    on 2/23/2010 9:43 AM

  26. Unknown said,

    You're the best! Nice fix!

    on 2/25/2010 4:21 AM

  27. Anonymous said,

    Thanks for clearly explaining what that process is, and especially how to disable it. jqs.exe was causing the CPU on my Win XP machine to spike up between 70 to 90% usage.

    on 4/15/2010 11:00 AM

  28. Thank you!

    on 5/04/2010 12:35 AM

  29. jwp said,

    It appears that if you disable jqs.exe and if you have the Firefox add-on "Java Quick Starter 1.0", then many things cease working correctly (or, at least, as expected) when you restart Firefox. For me, for example, the Google toolbar disappeared, the icons for add-on functions disappeared, the add-on management console quit working as soon as, e.g., I clicked "Options" on one of them, etc. Re-enabling jqs.exe and rebooting brought Firefox back to working as expected. This was FF v3.6.x, by the way. I have not tested what happens if I first disable the Java Quick Starter add-on in Firefox, and then disable jqs.exe.

    on 5/19/2010 2:15 PM

  30. Anonymous said,

    worked....but you need the control panel in classic view.

    on 6/02/2010 10:02 PM

  31. Thanks this was a useful post that helped me take care of this issue.

    on 6/15/2010 8:52 AM