I posed the question to Chrome Gemini to ask why Jira Software Server installed on Windows 11 and then uninstalled would still appear in the Control Panel. It provided the information below. I have no way to verify the information but you may find it useful.
As a side note license sales for Jira Software Server ended in 2021 and support ended in 2024. Also it was never supported for installation on Windows 11.
Here is the Gemini response:
When Jira Server is still listed in the Control Panel after a standard uninstallation and reboot, it usually means the Windows Registry entry for the uninstaller was not properly removed, often because the Jira background service was still active during the process. [1, 2, 3]
Because Windows 11 isn't a formally supported platform for Jira Server, installer scripts occasionally fail to clean up registry paths cleanly. You can remove it completely using the following steps:
Step 1: Remove the Phantom Control Panel Entry
Press Windows Key + R, type regedit, and press Enter to open the Registry Editor.
Navigate to the following path: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
Look through the folders nested inside Uninstall. Look for a folder explicitly named Jira (or a folder containing a string of characters where the DisplayName value on the right says "Jira Software").
Right-click that specific folder and click Delete.
Note for 64-bit/32-bit cross-registries: Also check HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall if you don't find it in the first path.
Refresh your Control Panel; the phantom entry will be gone. [2, 4]
Step 2: Clean up the Leftover Windows Service
The uninstaller often leaves behind the underlying Apache Tomcat service container. If the background service is still sitting in your system, clear it using the Atlassian Service Deletion Guide: [5]
Open the Windows Start menu, type cmd, right-click Command Prompt, and select Run as Administrator.
Run the deletion command:
sc delete JIRA
(If your service had a custom version name, you can find the exact name by opening the services.msc app). [6, 7]
Step 3: Wipe Leftover Local Files
The installer intentionally leaves your database configuration and historical attachments behind so data isn't accidentally lost. Delete these folders manually to completely free up disk space: [2, 4]
Installation Directory:C:\Program Files\Atlassian\Jira (or wherever you placed it)
Home Directory:C:\Program Files\Atlassian\Application Data\Jira [2, 4, 8, 9]
Did deleting the registry folder clear the listing, or did you encounter an "access denied" error while attempting to clear out the leftover files? If you're planning to try a clean reinstall, let me know so we can ensure the local files are prepared correctly.
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