What is javaws.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 javaws.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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Javaws.exe file information

Windows Task Manager with javaws
Javaws.exe process in Windows Task Manager

The process known as Java™ Web Start Launcher belongs to software Java™ Platform (version SE 8, SE 7) by Oracle (

Description: Javaws.exe is not essential for Windows and will often cause problems. The file javaws.exe is located in a subfolder of "C:\Program Files (x86)" (typically C:\Program Files (x86)\Java\jre1.8.0_60\bin\). Known file sizes on Windows 10/8/7/XP are 274,016 bytes (38% of all occurrences), 271,968 bytes and 6 more variants. 
The program is not visible. The file is not a Windows system file. The javaws.exe file is a Verisign signed file. The file is certified by a trustworthy company. Javaws.exe is able to monitor applications. Therefore the technical security rating is 22% dangerous; however you should also read the user reviews.

Uninstalling this variant: If you have any problems with javaws.exe, you can look for help [1][2] from the software company Oracle, update the program to the latest version or uninstall Java 8 or Java 7 from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify javaws.exe related errors

Important: Some malware camouflages itself as javaws.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder, for example Trojan.Win32.VBKrypt.hkft (detected by Kaspersky), and TROJ_GEN.R29C7JG (detected by TrendMicro). Therefore, you should check the javaws.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

Runs java applications deployed from webpages in a security sandbox. Apps cannot write to disk, use printer etc unless they are signed and the user accepts the signature)
  me self   (further information)
javaws.exe is a process by Sun Microsystems which gives functionality to this Internet protocol. Often works together with Internet Explorer.
  Mike   (further information)
sei que é importante paraaplicação na RAIS
  Francisco Mariano da Silva  
javaws.exe duplicates itself and runs in the task manager hundreds times.
Opened 7500 processes. Really. My pc had a massive error, restarted and checked if my HDD was broken. Now its shutting down processes ... 5 per second. (Itll take some time)
javaws.exe stand bei mir (Win 7 32bit) nach dem Booten im Taskmanager - 10x, 100x, 1000x, dann 2000x. Spätestens dann ist er PC tot. Ich habe Java deinstalliert. Ist es meine Aufgabe, Java zu reparieren?
  Kaba 151103  
If you are seeing multiple version of JAVAWS.EXE running in the background, try to open a COMMAND PROMPT (START = RUN = Type: CMD and hit enter. Once in the command prompt,, type the following line and hit enter to execute it: taskkill /f /im javaws.exe If there are still some processes visible, hit the ARROW UP Key then ENTER to re-run this task. Keep doing it until all processes have been removed
  Arthur Cooper  

Rating chart

Summary: Average user rating of javaws.exe: based on 6 votes with 7 user comments. 3 users think javaws.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user suspects danger. One user thinks javaws.exe is dangerous and recommends removing it. One user is not sure about it.

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Best practices for resolving javaws issues

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

javaws.exe [all]