What is jucheck.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 jucheck.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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Jucheck.exe file information

Windows Task Manager with jucheck
Jucheck.exe process in Windows Task Manager

The process known as Java Update Checker or XAMPP Control Panel for Windows belongs to software Java Platform SE Auto Updater (version 2 0) or Java (version 6 Update 15 (64-bit), 2 Platform Standard Edition 5.0 Update 5) or Java™ Platform (version SE 6) by Oracle ( or Sun Microsystems ( or NAT Software, Germany (

Description: Jucheck.exe is not essential for Windows and will often cause problems. The jucheck.exe file is located in a subfolder of "C:\Program Files\Common Files" (for example C:\Program Files (x86)\Common Files\Java\Java Update\). Known file sizes on Windows 10/8/7/XP are 507,312 bytes (12% of all occurrences), 923,184 bytes and 19 more variants. 
The program has no visible window. Jucheck.exe is a Verisign signed file. The file has a digital signature. It is not a Windows core file. The process can be uninstalled in the Control Panel. Therefore the technical security rating is 11% dangerous; but you should also compare this rating with the user reviews.

Uninstalling this variant: If you still experience problems with jucheck.exe, you can uninstall the associated program (Start > Control Panel > Uninstall a Program > Java Auto Updater).

Recommended: Identify jucheck.exe related errors

Important: Some malware camouflages itself as jucheck.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Artemis!22C1ED674505 (detected by McAfee), and Backdoor.Win32.Androm.sla or Trojan-Dropper.Win32.Agent.bjtufq (detected by Kaspersky). Therefore, you should check the jucheck.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

Found in Program Files\Java\j2re1.4.2_03\bin\
Java Environment
  Daniel   (further information)
java update
Java Update Process
Java Runtime Module update checker
found in \WINDOWS\Prefetch as well as \Program Files\Java\j2re1.4.2_03\bin\
from sun, it's the java update checker.
sun's java updater
It is Sun Java Update checker
seems to be a java update checker
can i delete it from computer
  barry lillystone  
It can be removed by disallowing the setting in Java that checks for updates automatically
Java sun updater
  LeoArietis   (further information)
Jucheck.exe is java's update checker. Why someone flagged it as dangerous is beyond me.
Jucheck.exe will check on the internet for available updates for the Java Virtual machine installed on your computer. If updates are available it will notify you and/or manage the download and install of the updates.
c:\Program Files (x86)\Java \jre6\bin\
  df1   (further information)
computer not opening files,process jucheck.exe running help
java updater
Java wants to update
There is a version residing at "C:\Program Files\Java\jre6\bin\jucheck.exe" -- size 422K (Windows 7) published by Sun Microsystems that is a legitimate checker to see if you have the latest Java version. If you do not need Java, you can uninstall it or also you can disable the automatice update feature in the settings. Java is not critical to Windows but may be required by some applications.
still do not know if it is safe or I need it to run properly
java update checker
Only need one of these files so delete any that have notbeen accessed in a while. Or check for updates manually and remove this exe file.
  TonyDL   (further information)
It's Java Update. Nothing wrong with it!
it is simply used as a Java Updater, assumung that the program really is as it says.
  Madison   (further information)
I believe it's some kind of Nazi software used in WW2
It comes with a brand new machine, installed at C:\Windows\System32, so it is hardly true that 94% of the ocurrences in this folder are dangerous.
We have received a brand new laptop from Dell with Windows 7 Home Premium on it. UAC reports jucheck.exe running from "C:\Windows\System32\jucheck.exe". This seems contrary to the information available here.
It's the Java runtime updater If you use a program written in Java, then you'll need this to run.
Found four on my computer, three in the right places and one in win32 (the one that keeps prompting the security check). Think I'll delete that one as I don't trust it based on other information from around the internet.
Java updater - Windows Vista / 7 complain when it tries to check unless you accept it.
jucheck.exe dosen't show up on file searches, so it hides it's location, therfore, it's OBVIOUSLY spyware or some other malicious program.
If you look there is a java scheduler called jusched.exe not jucheck.exe, the jusched is registerd as sun micro and is in C:\Program Files\Common Files\Java\Java Update\jusched.exe
Part of: Sun Java UpdateChecker Module / By: Sun Corporation
  ricky   (further information)
Its coming up crashed Sims 3 a couple of times. I set it to not notify about 5 times. I finally gave up and just uninstalled Java from my system.
It was in my C:\Program Files\Java\jre6\bin\jucheck.exe. My norton program said it could be trusted, so I took the chance. It just updated my java.
This is a safe file used for Java Updating
  Kevin   (further information)
To make sure, I updated Java to the latest version directly from Why can't but jucheck.exe keep saying I should install the latest version of java, that bothers me; why can't it detect the newest version I installed? It looks suspicious to me
You can delete it if you like, though you'll have to update your Java manually if you do.
It seems like jusched.exe is the java updater. Why would jucheck.exe with such an obvious similarity appear?
java update check - completley harmless :)
it is a java updater, IF its where its supposed to be, otherwise its a trojan. It ruined my computer once so watch out
I have let it run - no problems. (windows 7 64bit, in C:\windows\system32)
java updater
I located it in a different Java sun folder besides another jucheck.exe it's digital signature was from aidex i tried deleting it from a temp folder but going into this java floder and finding the unknown publisher one and removing it seemed to get rid of it
I found one in C:\Users\[me]\AppData\Local\Temp I renamed it for now and the access tries stopped
  Don M  
A Trojan horse if runs from C:\Users\AppData\Local\Temp\jucheck.exe
  Michael   (further information)
No this is NOT a java updater.Anything with the name juchuck.exe and jucheck.exe is a virus pretending to be a java updater. I just recently had to deal with removing this nightmare!If you dont believe me first notice how the user of it is UNKNOWN.Red flag right there.Secondly java does NOT need your permission to check for updates unless you change the setting manually.So this should also send up a red flag.The proper java update device i forgot but if you press ctrl shift esc you can see it in the running programs section.My point is that its a virus that is hard to detect.
Unless the publisher is Java, then it's a virus. People are so quick to think people are dumb and not know what jucheck.exe is, but it is actually a virus that uses the same name. Click more details on the popup and see where the file is. If it's not in a Java folder, then it's a virus.
  JRR   (further information)
it turned out to be a trojan virus
  Michael R  
It's a virus, my AVG said it was a threat/
Found it in C:/Windows/Prefetch. Since it's not hiding itself, and is visible, and it won't let you not download it, then it is most likey needed in order to have Java. Scanned it just now. It isn't hidden, no suspicion, nor detection. Seems fine.
Avira AntiVir told me it was a trojan virus. It quarantined it and everything.
Java has a big hole, used by outsiders to control your computer. The type of infiltration is Trojan. The Trojan contains a backdoor. It can be controlled remotely. The trojan creates the following files:
  Glaukus   (further information)
When you uncheck the automatic updates in Java's properties, the checkbox becomes checked when you start your system up. Therefore it is a form malware. Do not trust it.
After update did block partialy few of my programs. I did uninstaled and restore the system with few days before updating
right clicked java's icon on taskbar, properties, uchecked auto-update: it rechecked itself after start up. keeps popping up.Deleted Java 6 from "Remove Programs" and juckek exe stopped popping in the taskbar and the icon disappeared from there too
Seemed to appear when I downloaded BbIM on my computer.
I tried to install it and my computer reported that the file was corrupt....
  Lydia Guidry  
I accept jucheck.exe to download Java update and lost internet. I have win7 on my computer, so it takes time to repair.
As of 4/9/2013, the serious security venerability in version 7 update 7 still hasn't been fixed. Java is at currently at 7 update 14. I have disabled Java until it is fixed as has been recoomend by the US government. Firefox has built in blocking java into it's software.
This file is part of Java(TM) 2 Platform Standard Edition 5.0 Update. Jucheck.exe is developed by Sun Microsystems, Inc and is now owned by Oracle.
  Irena   (further information)
it pops up intermittently
  my name  

Rating chart

Summary: Average user rating of jucheck.exe: based on 94 votes with 63 user comments. 25 users think jucheck.exe is essential for Windows or an installed application. 14 users think it's probably harmless. 23 users think it's neither essential nor dangerous. 12 users suspect danger. 20 users think jucheck.exe is dangerous and recommend removing it. 11 users don't grade jucheck.exe ("not sure about it").

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Best practices for resolving jucheck issues

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

jucheck.exe [all]