How can I completely uninstall a software from my computer?

To uninstall software on Windows, follow these steps:
Close the software and select Start > Control Panel or Start > Settings > Control Panel.
Windows XP: Double-click Add or Remove Programs.
Windows 7, Vista: If the Control Panel is in the Home View of Control Panel, click Uninstall Programs under Programs.
Windows 10: Click Uninstall Programs under Programs.
On the list of applications, right-click the software and then click Uninstall or Delete.
Click Next > Delete, and then follow the instructions to uninstall the program.