Today, Windows activation is tied to your Microsoft account and hardware hash. Old-school WAT removal tools are obsolete, but they remain a nostalgic relic of:
WAT 2.2.6.0 is a specific version of this software that was released to address certain issues with Windows activation. However, some users have reported that this version of WAT has caused problems on their systems, such as: Remove WAT 2.2.6.0