Finding the right driver for a generic device like the Ky-Rs9600 adapter on an older system like Windows 7 can be tricky. Your most reliable solution is to identify the device using its Hardware ID ( VID_0FE6&PID_8101 ) and use the more common SR9600 driver. Since Windows 7 is end-of-life, updating to a newer OS is the best long-term solution for better security and native driver support. But for your immediate needs, the methods above should help you get connected.
Windows 7 64-bit requires all drivers to be digitally signed by Microsoft. If your driver is unsigned, you will see a Code 52 error.