Install GRUB4DOS and Use loadslic command to Activate Windows 7/Vista and Server 2008/2011

One of the activation methods available for activating Windows is by using the mechanism called “System Locked Pre-installation” (also known as SLP).

This method is widely used on computers and hardware sold by OEM manufacturers. Microsoft has come up with this scheme to allow hardware vendors to mass-produce and sell computers with Windows pre-installed. Computers that are activated using SLP method each have a vendor-specific signature embedded in the BIOS, called SLIC (software licensing description table).

To use the SLP method, the computer must have a special BIOS that has OEM SLIC signature. The SLIC signature is unique for each OEM computer-manufacturer. You may be tempted to flash the BIOS with a SLP-enabled BIOS, but it is not safe and may break the computer system or make it unbootable. There are safer alternatives, and the most widely used artificial SLP activation method is by using a special version of GRUB4DOS patched with loadslic command. The patched GRUB4DOS is able to allow SLP activation for Windows 7, Windows Vista, Windows Server 2011 and Windows Server 2008 (available here).

• OpenLoader.rar

First, use bootlace.com under DOS to install GRLDR bootstrap code to MBR. Alternatively, you can use install-mbr command under Linux to install generic MBR code to MBR. The reason for doing this is because the MBR code installed by Windows doesn't allow booting from non-Microsoft bootloader.

Then, with 7-zip (or WinRar or Winzip), copy the SCRIPTS folder from inside the OpenLoader.rar package to C:\Windows\Setup. Right-click on GRUB.CMD, and run it as Administrator. Upon reboot, a standard Grub4Dos menu is displayed with boot options. In the menu, you can choose one of several SLIC codes from major computer vendors. After choosing one and booting Windows with software-modified OEM SLIC BIOS, you should be able to activate Windows by using the slmgr commands like this.

slmgr -ilc oemcert.xrm-ms
slmgr -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

Using the slmgr script requires the Administrator privilege. Open the Command Prompt (cmd.exe) as Administrator and type the above commands. Replace oemcert.xrm-ms with the actual digital certificate for the hardware vendor listed in your BIOS. And type the actual 25-digit OEM key in place of XXXXX-XXXXX-XXXXX-XXXXX-XXXXX.