Thats the Ricoh Memory Card Reader on the W520. I'll add the link once I get the support page up.
http://www.pcidatabase.com/search.php?device_search_str=E823 <-- this tells what the device is
http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/8ass82ww.exe <-- Try this
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