How do I remove conflicting security products manually on a PC?

Note: Different Windows version may have slight variations in the steps.

Select Start > Control Panel.
Select Programs > Programs and Features.
Locate the security product you want to remove. Right-click it, and select Uninstall. The User Account Control may appear, type in your administrative credentials, and select Yes.
When the setup window appears, follow the instructions on screen to uninstall the security product.
If asked, restart your computer to complete the uninstallation of the product.