KMSAuto 1.9.9 b06 is an unofficial activation tool used to emulate KMS-based activation for Microsoft products. While it may appear to “work” for activation, it carries legal, security, and stability risks. The recommended course is to use legitimate licensing channels or supported free alternatives to avoid potential malware, compliance issues, and system instability.
Specific "b06" (Beta 06) or point releases generally focus on compatibility updates rather than new visual features: Updated KMS Servers KMSAuto 1.9.9 b06