Hello,
You can try the following steps.
Disable LinkedIn from Startup Apps:
Press Ctrl + Shift + Esc to open Task Manager.
Go to the Startup tab.
Look for LinkedIn in the list, right-click it, and select Disable.
Check LinkedIn App Settings:
Open the LinkedIn app.
Go to Settings and look for any options related to startup or notifications. Disable any settings that might cause the app to open on startup.
Best Regards,
Hania Lian
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.