Period of activation is 180 days or 6 Month and you can renew it.
This activator support for:
Windows 8.1 Professional
Windows 8.1 Professional Wmc
Windows 8.1 Professional_N
Windows 8.1 Enterprise
Windows 8.1 Enterprise_N
Windows 8.1 ProfessionalPreview
Windows 8.1 Preview
Windows 8.1 CoreARM
Windows 8.1 Core
Windows 8.1 CoreN
Windows 8.1 CoreSingleLanguage
Windows 8.1 CoreCountrySpecific
Windows 8.1 EmbeddedIndustry
Windows 8.1 EmbeddedIndustryE
Windows 8.1 EmbeddedIndustryA
Windows 8 Professional
Windows 8 Professional N
Windows 8 Enterprise
Windows 8 Enterprise N
Windows 8 ProfessionalPreview
Windows 8 PreRelease
Windows 8 ProfessionalWMC
Windows 8 CoreARM
Windows 8 Core
Windows 8 CoreN
Windows 8 CoreSingleLanguage
Windows 8 CoreCountrySpecific
Windows 8 EmbeddedProfessional
Windows 8 EmbeddedEnterprise
Windows 7 Professional
Windows 7 Professional N
Windows 7 Professional E
Windows 7 Enterprise
Windows 7 Enterprise N
Windows 7 Enterprise E
Windows Vista Business
Windows Vista Business N
Windows Vista Enterprise
Windows Vista Enterprise N
Windows12Server Standard
Windows12Server Datacenter
Windows12Server Standard Core
Windows12Server Datacenter Core
Windows12Server Core
Windows12Server CoreN
Windows12Server Multi Point Standard
Windows12Server Multi Point Premium
Windows12R2Server Standard
Windows12R2Server Datacenter
Windows12R2Server Standard Core
Windows12R2Server Datacenter Core
Windows12R2Server Cloud Storage Core
Windows12R2Server Cloud Storage
Windows12R2Server Solution Core
Windows12R2Server Solution
Windows08Server Standard
Windows08Server Enterprise
Windows08Server Data Center
Windows08Server HPC
Windows08R2Server Standard
Windows08R2Server Enterprise
Windows08R2Server Data Center
Windows08R2Server HPC
Windows08R2Server Web
How to Crack
Install the aplication
After install, run KMS as admin
Click on "clean activation hystory"
Click on 'update server' to update kms server
Select your Windows
Click on 'Activation Now!'
Done, enjoy
Downloads
Windows KMS Activator Ultimate 2016 v2.8