The should be no need to install drivers for the Corechip SR9900 it should pug into Windows 7 onward and work straight away. If you do need to install the driver manually you can they are below. These adapters are cheap sometimes $2 shipped from CN, so expect what you pay for, these are prone to failures.
These dongles are suspicious according to this article:
https://lcamtuf.substack.com/p/investigating-an-evil-rj45-dongle
Corechip SR9900 USB2.0 to Fast Ethernet Adapter Driver
File: SR9900.zip
1f79c8ccfeab1fe2499c87c6b11e51604e09338ea8ceacd8f9ae95e5d35a7f23