I did found out how stop a running files.
Windows 8
- Press Windows Key + R.
- In the resulting box, type msconfig and press Enter.
- In the System Configuration window that comes up, select Selective startup.
- Uncheck the box for Load startup items.
- Click Apply.
- Click Okay.
- Click Restart
Windows 10
- Right-click on your taskbar.
- Click on Task Manager .
- Click on the Startup tab.
- For each application enabled on startup select them and click on Disable .
- Restart your computer.
All other important information on Mac and other things to can be found on here How do I disable background applications that could be interfering with the Epic Games Launcher? - Epic Games Support
( I was still having trouble with grand theft auto 5 but I finally figure it out)