Method 1:
1. In the Start Menu search line, type shell:startup and press Enter.
OR
Open this folder: C:\Users(User-Name)\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
Drag the programs that you want to add to the start-up.
Method 2:
Go to Start -> All Programs -> Start Up
And Drag the programs that you want to add to the start-up
Method 3:
Go to Start -> Type "msconfig" in search or run option and Hit Enter
Enable and Disable Program from the list.
Method 4:
Open Regedit.msc from Run Option.
Modify the keys below for start-up programs:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
AND
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
Method 5:
Use Softwares such as Glary Utilities, CCleaner, Windows Manager, etc