After launching the toolkit, you'll see several options, including ones for Windows and Office. Choose the product you want to activate.
The software landscape has changed significantly since version 2.5.1 was released (circa 2015-2017). microsoft toolkit 2.5 1 windows and office activator
"An assigned product key is required for licensed use of the software. All product keys are Confidential Information of Microsoft... Customer may not disclose product keys to third parties." After launching the toolkit, you'll see several options,