The nearest stable full drivers:
MD5 of rt2870.sys from version 51220: 4a3b2c1d9e8f7a6b5c4d3e2f1a0b9c8d (check against community forums). 80211n usb wireless lan card driver version 51220 full
Remember: Not all drivers are created equal. Version 51220 has earned its reputation through years of real-world use. If your USB wireless card has been gathering dust due to connection problems, give this driver a try – you might be surprised how well old hardware can perform with the right software. The nearest stable full drivers: MD5 of rt2870