In 64-bit versions of Windows (starting with Vista and solidified in Windows 7), Microsoft implemented a security feature requiring that all kernel-mode drivers be digitally signed with a recognized certificate. This was designed to prevent malware and rootkits from hooking into the deepest levels of the operating system.
The software worked by installing a driver that would emulate the presence of a physical Sentinel dongle. By "dumping" the data from the physical key (usually via a file with a .dng extension), Sentemul could trick the licensed software into believing the hardware was present. This was particularly useful for laptops or machines where USB ports were limited or the dongle was prone to wear and tear. sentemul2007 windows 7 x64
Alex raised an eyebrow. "SentEMUL2007? What's that?" In 64-bit versions of Windows (starting with Vista