If there's an unwanted program that is launched when you log in on Windows, check the following places (ordered from most common to most obscure).
- A startup program:
taskmgr(Startup tab), Check for Startup Apps at:
Settings -> Apps -> Startup.
- A shortcut in the start menu's startup folder:
- A service that is set to start automatically. Run
msconfig.exe(shows non-Microsoft services, which is nice), or
taskmgr(Services tab), or
- A scheduled task. Run
taskschd.mscand look under "Task Scheduler Library". Check for any unwanted tasks that starts the unwanted program. Right click and disable.
- A group policy.
gpedit.msc, then check:
Computer Configuration -> Administrative Templates -> System -> Logon -> Run these programs at user logon.