Summarize this article:

Click the Windows logo in the bottom-left corner of the screen. This will search your computer for the Task Manager, which is a program that can close troublesome programs. It's at the top of the Start menu. The Task Manager app will open. You'll see this in the upper-left side of the Task Manager window. If you see any high memory usage apps which don't need to be running right now, click one app's name, click End task in the lower-right corner of the window, and repeat until you've closed every app or program that you want to close. This process is easier if you click the Memory tab to sort the programs from greatest to least in terms of memory use. It's at the top of the Task Manager window. Every program on this list will start up with your computer by default, which can slow down your computer's performance. Click a program for which you want to revoke startup access, then click Disable in the lower-right side of the window.  If the button in the lower-right side is Enable instead, the program is already disabled. You can repeat this process for as many startup programs as needed. When you're done here, feel free to close the Task Manager. Your settings will be saved.

Summary:
Open Start . Type in task manager. Click Task Manager. Click the Processes tab. Close a program if necessary. Click the Startup tab. Review the list of startup programs. Disable a startup program.