Read instructions first. Another one Windows 7/Vista Activator for:
* Windows 7 Ultimate x86 & x64
* Windows 7 Professional x86 & x64
* Windows 7 Home Premium x86 & x64
* Windows 7 Home Basic x86 & x64
* Windows 7 Starter x86
* Windows Server(R) 2008 Standard x86 & x64
* Windows Server 2008 R2 Standard x86 & x64
* Windows Server(R) 2008 Enterprise x86 & x64
* Windows (R) Small Business Server 2008 x86 & x64
* Windows Vista Ultimate x86 & x64
* Windows Vista Business x86 & x64
* Windows Vista Home Premium x86 & x64
* Windows Vista Home Basic x86 & x64
* Windows Vista Starter x86

Advantage:
1. Fast Install (since based on WMI script).
2. Single file.
3. Much smaller in size (since based on .NET Framework 2.0).
4. Slic can be added in bootmgr (Not recommended)
5. Cert & Slic option are together for OEM install.
6. Cert can be installed/replaced only.
7. Key can be replaced only.
8. Option to add your customised OEM info and logo.
9. Option to backup and restore your licence (preferred retail and wak).