How to perform unattended uninstall for SQL Server Express

Recently, I received a question about unattended uninstall for SQL Server Express edition. This article describes how to perform this task.


We need to take in consideration before to proceed 


User that performs the process must be a local administrator with permissions to log on as a service. You can review more information about required permissions here. If the machine has the minimum required amount of physical memory, increase the size of the page file to two times the amount of physical memory. Insufficient virtual memory can result in an incomplete removal of SQL Server. On a system with multiple instances