A Windows 10 activator BAT file is a type of script file that contains a series of commands designed to activate Windows 10. These files are written in batch scripting language and are executed by the Windows Command Prompt. When run, the BAT file automates the process of activating Windows 10 by communicating with Microsoft's activation servers.
If you already downloaded and ran a "Windows 10 activator BAT file" and are now noticing strange behavior (CPU at 100%, pop-ups, new browser extensions), here is the emergency protocol: windows 10 activator bat file