Operating system is Windows 7 64 bit. I have tried HP URL for a driver http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/swdDetails/?javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken&javax.portlet.prp_bd9b6997fbc7fc515f4cf4626f5c8d01=wsrp-navigationalState%3Didx%253D%257CswItem%253Dob_100089_1%257CswEnvOID%253D%257CitemLocale%253D%257CswLang%253D%257Cmode%253D5%257Caction%253DdriverDocument&javax.portlet.tpst=bd9b6997fbc7fc515f4cf4626f5c8d01&ac.admitted=1387576040553.876444892.199480143
no luck on this specific card.