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.
Fast 10/100M Ethernet interface, supports USB full speed and high speed mode
• Supports CDC-ECM
• Network cable cross detection and automatic correction
• Auto-negotiation function
• Compatible with IEEE 802.3 10Base-T/100Base-TX/100Base-FX
• Supports twisted pair exchange, polarity, phase offset correction
• Supports full duplex IEEE 802.3x flow control and half duplex conflict pressure fallback flow control
• Supports IEEE 802.1Q VLAN tag
• Supports IEEE 802.3az-2010 (EEE) energy saving mode
• Dynamic power management reduces no-load and light load power consumption
• Supports Wake-on-LAN through network link status change, magic packet, and remote wakeup events
