Warning: Microsoft Toolkit is widely distributed as an activation/patching utility for Microsoft Windows and Office. Many distributions are unofficial and used to bypass Microsoft licensing; using or downloading such tools may violate software license terms and expose systems to malware. The following is an informational, non-actionable summary for research and risk-awareness only.
Key Features of Microsoft Toolkit 2.7.3
Back up license "tokens" (useful when reinstalling Windows). Check the version and build of installed Office products. Remove Office completely to fix "activation failed" errors. System Requirements Microsoft Toolkit 2.7.3
The 2.7.3 release was an upgrade over version 2.6.4, introducing several improvements: Enhanced Compatibility: Microsoft Toolkit 2
Conclusion
You're looking for a solid guide on "Microsoft Toolkit 2.7.3". Microsoft Toolkit 2.7.3