Hi there,
posting this because the usual “clean reinstall / use the Razer cleaner / check services” advice did not fix anything.
Issue:
Razer Synapse 4 stopped loading correctly on Windows startup. The Razer tray/container starts, but Synapse itself does not fully launch. Opening Razer manually shows that Synapse is not running or only partially initialized.
What I already tried:
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Full uninstall of the Razer package
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Razer cleaner tool
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Fresh reinstall
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Windows Fast Startup disabled
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Razer Elevation Service set to Automatic for testing
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Task Scheduler delayed startup
None of that fixed the real issue.
What the logs show:
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RazerAppEngine.exe is running.
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RzEngineMon.exe is running.
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Razer services are running.
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Synapse installer log shows “installation complete.”
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But launching only RazerAppEngine.exe starts the tray/container, not the actual Synapse module.
The important finding:
Razer’s own launcher log shows Synapse is supposed to be started with:
--url-params=apps=synapse
When I run this manually:
C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe --url-params=apps=synapse
Synapse opens correctly.
So this looks like a RazerAppEngine / Synapse 4 startup-routing bug. The normal startup entry appears to launch the container, but not the actual Synapse module. This is not a mouse issue, not an Elevation Service issue, and not solved by reinstalling.
My workaround:
I disabled normal Razer startup and created a Task Scheduler entry at logon that runs PowerShell, waits 15 seconds, then launches:
RazerAppEngine.exe --url-params=apps=synapse
That works, but users should not have to create scheduled tasks to launch mouse software correctly.
Time to switch to Logitech?