Startup Apps

[king1]

uninstall the program as you would normally, then the uninstall process will remove the startup app entry

If it is a program you would still want installed then you would need to remove the startup entry in the registry, usually stored in either of

HKLM\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run
HKLM\Software\Microsoft\Windows\CurrentVersion\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\Run

Details here
https://support.microsoft.com/en-us/wind...34c844e473#