> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/microarray/lims/microarray-lims-reference_material-list/000001706.md).

# The required version of Java for Illumina LIMS is Java 8 for the foreseeable future

This article impacts Illumina LIMS customers who have upgraded or are considering upgrading their version of Java to a version greater than Java 8. This bulletin applies only to Illumina LIMS, not Clarity LIMS customers.Illumina LIMS Project Manager has been optimized to work on Java 8. Avoid using older or newer versions of Java.

1. To determine which Java version is running on your computer, do the following (note: the version of Java on your system will be listed as Java 8 with an associated update number (e.g., Java 8 Update 111):
   1. **Windows 10**
      1. Select the **Start** button
      2. Scroll through the applications and programs listed until you see the **Java** folder
      3. Select the **Java** folder, then **About Java** to see the Java version
   2. **Windows 8**
      1. Right-click on the screen at bottom-left corner and choose the **Control Panel** from the pop-up menu.
      2. When the Control Panel appears, select **Programs**
      3. Select **Programs and Features**
   3. **Still have questions?**
      1. Visit the [Java site](https://www.java.com/en/download/help/version_manual.xml) for additional details
2. Do not upgrade Java until further notice even when your system prompts you to do so.
3. Upgraded to Java 10 or later already? Downgrade to Java 8 for Project Manager to run properly:
   1. **First, remove current versions of Java. Note: Older versions of Java may appear in the program list as J2SE, Java 2, Java SE, or Java Runtime Environment:**
      1. Windows 10 - Uninstall Programs
      2. Select Start
      3. Select Settings
      4. Select System
      5. Select Apps & features
      6. Select the program to uninstall and then select its Uninstall button.
      7. Respond to the prompts to complete the uninstall
      8. Windows 8 - Uninstall Programs
      9. From the Start screen, enter Control Panel in the Search box. Select the Control Panel.
      10. When the Control Panel appears, choose Uninstall a Program from the Programs category.
      11. Select the program to uninstall, and then right-click and select Uninstall or you can select the Uninstall option located at the top of the programs list.
      12. Click Yes to confirm the program uninstall.
   2. **Install Java 8**
      1. Visit the [Java Downloads site for Windows](https://www.java.com/en/download/help/windows_manual_download.xml). Follow the “Download and Install” instructions

Customers will be notified when Illumina LIMS is compatible with Java 10 or later. To prevent unexpected behaviors or issues, use Java 8 or older.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #1706), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000001706%20-%20Microarray%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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