These tools require elevated permissions to run, effectively giving an unknown developer full control over your system.
Instead of using risky third-party scripts, you can use these official methods to activate your software: Where to enter your Office product key - Microsoft Support
Re-Loader Activator is an unauthorized application that automates the activation of various Microsoft products .
From a functional standpoint, Re-Loader 3.3 was designed to be a lightweight, "one-click" utility. It typically operates by simulating a Key Management Service (KMS) or utilizing OEM injection methods to validate the software. The appeal for many users is the interface's simplicity, allowing for the activation of multiple products simultaneously. Despite this convenience, the stability of these activations is never guaranteed. System updates from Microsoft frequently patch the exploits used by these tools, which can lead to activation "drops" or recurring notifications that your software is not genuine.