Windows 7 x64 and Windows Vista x64 driver signature problem.
Vista x64 and Windows 7 x64 requires special driver signature.
You can used F8 on bootup and then selected to disable check for signed drivers or enable test signature using Driver Signature Enforcement Overrrider utility. All you need is to disable User Access Control (UAC) in your Control Panel, reboot the computer, then start Driver Signature Enforcement Overrider, select "Enable Test mode" option, then reboot your system again. Then Dongle emulator driver will be ready for running in your Windows x64 environment.
Here is the link to Driver Signature Enforcement Overrider: http://www.ngohq.com/home.php?page=dseo
Signed PRO version of dongle emulator for Windows x64
You can use USB Dongle Backup and Recovery PRO that is 100% twin of regular version but its driver is signed and it can be loaded without any kind of additional efforts.