# Cannot start JabRef 4.0.3.0 on Windows 10 Enterprise (64 bit)

**URL:** <https://discourse.jabref.org/t/cannot-start-jabref-4-0-3-0-on-windows-10-enterprise-64-bit/919>\
**Category:** Help\
**Created:** [November 28, 2017, 4:16am UTC](https://discourse.jabref.org/t/cannot-start-jabref-4-0-3-0-on-windows-10-enterprise-64-bit/919 "2017-11-28T04:16:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Zysygy](https://avatars.discourse-cdn.com/v4/letter/z/9de053/32.png) [@Zysygy](https://discourse.jabref.org/u/Zysygy)\
**Post date:** [November 28, 2017, 4:16am UTC](https://discourse.jabref.org/t/cannot-start-jabref-4-0-3-0-on-windows-10-enterprise-64-bit/919/1 "2017-11-28T04:16:25Z")

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I uninstalled JabRef to try and fix a different issue (.bib files were being created without write access for the owner).  
When I re-installed it, starting using icon or direct from .exe fails.  
A process called JabRef.exe appears in Task Monitor, but no UI appears.  
I downloaded the 64-bit version today, and installed immediately after fresh reboot. (I.e. uninstall, reboot, install).  
I tried “java -jar JabRef-4.0.jar -d all” suggested in a similar problem.  
I get the stack trace at the bottom of this message.  
Any other pointers welcome.

java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException  
at com.microsoft.applicationinsights.internal.config.TelemetryConfigurationFactory.(TelemetryConfigurationFactory.java:65) ~[JabRef-4.0.jar:?]  
at com.microsoft.applicationinsights.internal.config.TelemetryConfigurationFactory.(TelemetryConfigurationFactory.java:53) ~[JabRef-4.0.jar:?]  
at com.microsoft.applicationinsights.TelemetryConfiguration.getActive(TelemetryConfiguration.java:70) ~[JabRef-4.0.jar:?]  
at org.jabref.Globals.startTelemetryClient(Globals.java:90) ~[JabRef-4.0.jar:?]  
at org.jabref.Globals.startBackgroundTasks(Globals.java:78) ~[JabRef-4.0.jar:?]  
at …

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**Author:** ![Siedlerchr](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/siedlerchr/32/216_2.png) [@Siedlerchr](https://discourse.jabref.org/u/Siedlerchr)\
**Post date:** [December 3, 2017, 5:25pm UTC](https://discourse.jabref.org/t/cannot-start-jabref-4-0-3-0-on-windows-10-enterprise-64-bit/919/2 "2017-12-03T17:25:55Z")

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Hi,

you are probably trying to run JabRef with Java 9, which is not yet supported.  
You need to downgrade to [Java 8](http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html) and it will work.

In case you experience other issues, I suggest trying the latest master version.  
[http://builds.jabref.org/master/](http://builds.jabref.org/master/)

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**Author:** ![Zysygy](https://avatars.discourse-cdn.com/v4/letter/z/9de053/32.png) [@Zysygy](https://discourse.jabref.org/u/Zysygy)\
**Post date:** [December 4, 2017, 1:11am UTC](https://discourse.jabref.org/t/cannot-start-jabref-4-0-3-0-on-windows-10-enterprise-64-bit/919/3 "2017-12-04T01:11:26Z")

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Thanks very much for that.  
Using Java 8 fixed the problem.