Windows Loader 2.2.2 and RemoveWAT are legacy software tools historically used to bypass activation protocols for Windows 7 and various Windows Server editions. While they achieved popularity for their ability to make unauthorized copies of the operating system appear genuine, they operate through significantly different technical methods—one by tricking the BIOS and the other by stripping away core system components.
Version 2.2.2 is the final major update, adding support for Windows Server 2012 R2 and various Windows 7 editions (Ultimate, Professional, Home Premium, etc.). It does not support Windows 8 or newer versions.