These are small executable files (.exe) that run in the background of your PC. They emulate the behavior of a genuine KMS server but redirect it to localhost (127.0.0.1 – your own computer). They modify system files, specifically the sppsvc (Software Protection Platform Service), to trick Windows into thinking it has successfully contacted a corporate activation server.
When you search for "Windows 7 KMS Activator," you are not looking for a Microsoft-approved tool. You are looking for a . These activators fall into three primary categories, none of which are endorsed or legal: Windows 7 Kms Activator