If you own a Razer mouse or keyboard, you’ve probably installed the Razer Synapse software. By default, it automatically pops up a “Razer” splash screen every time you boot your PC. Here’s how to stop the popup.
We performed this process with Razer Synapse 3. If you have an older version of Razer Synapse, the interface may look different.
To find the option, locate the green Razer icon in your notification area, right-click it, and select “Settings.” The icon may be hidden behind the up arrow to the left of your system tray icons.
Uncheck the “Show on Startup” option under Splash Screen here. The splash screen won’t appear when you sign into your PC.
That’s it—you don’t have to click anything else. Your changes are saved immediately.
You can now close the settings pane by clicking the X button at its top right corner and then close the Razer Synapse window.
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Source : How to Disable the Razer Synapse Splash Screen at Startup