If you open Task Manager and go to the Startup tab, it lists the programs that are registered in the Startup group or the Run key to run automatically when you sign in. But you might see an entry ...

Disable Opening PowerShell at Startup in Task Manager Delete PowerShell shortcut from Startup folder Run anti-malware software Troubleshoot in Clean Boot State. Let’s see each method in detail.

Just click the cog wheel in the bottom left corner of the Task Manager window to go into the settings, and you'll see the Default start page option with a dropdown menu to choose your favorite.