This is the loader application that's used by millions of people worldwide, well known for passing Microsoft's WAT (Windows Activation Technologies) and is arguably the safest Windows activation exploit ever created. The application itself injects a SLIC (System Licensed Internal Code) into your system before Windows boots; this is what fools Windows into thinking it's genuine.

The things you might want to know
It works on 32-bit and 64-bit systems
It's compatible with Windows 7 SP1 and all system updates
It's compatible with all system languages
It can be used to pre-activate Windows
It allows you to install custom OEM information
It features application integrity checking
It supports hidden partitions and some complex setups
It can work alongside Linux's GRUB or any other boot manager
It works with VMware, VirtualBox and Hyper-V
It works with most hard drive encryption software e.g. TrueCrypt or BitLocker
It allows you to add your own certificates and serials externally
It will install just the certificate and serial for users with an existing SLIC 2.1
It features automated system profiling (The application matches everything up for you)
It won't modify any system files
It runs before Windows is launched
No extra processes are run so you have nothing eating at your RAM
All key parts of the loader are encrypted with a custom encryption
Every user has a unique version of the loader installed on his or her system

Supported operating systems
Windows 7 Ultimate
Windows 7 Ultimate E
Windows 7 Professional
Windows 7 Professional E
Windows 7 Home Premium
Windows 7 Home Premium E
Windows 7 Home Basic
Windows 7 Starter
Windows 7 Starter E
Windows Vista Ultimate
Windows Vista Business
Windows Vista Business N
Windows Vista Home Premium
Windows Vista Home Basic
Windows Vista Home Basic N
Windows Vista Starter
Windows Server 2008 Enterprise
Windows Server 2008 Foundation
Windows Server 2008 Standard
Windows Small Business Server 2008
Windows Storage Server 2008 Standard
Windows Server 2008 R2 Enterprise
Windows Server 2008 R2 Foundation
Windows Server 2008 R2 Standard
Windows Small Business Server 2011 Standard

Note: You must be running build 7600 or greater for Windows 7 and Windows Server 2008 R2.
Note: I don't recommend using any of the Windows 7 E editions.
Note: Windows 7 N editions will only be supported when OEM SLP serials leak.

Version 2.1.3
* Added a new GRLDR version
* Added support for Windows Home Server 2011
* Added support for Windows Server 2008 R2 Datacenter
* Added a few new serials
* Improved handling for systems with missing ACPI tables