Yahoo Account Not Opening

from what i have heard (and i have not done any research of my own to comfirm this,  the thing is caused by a virus ,  appearantly undetected by your everyday AV (for now) and the main target seem to be yahoo msger ,  as alternative u could download and install pidgin  http://www.pidgin.im/download/windows/
its not are featured filled as yahoo ,  its quite simple and a good substitute for  yahoo msger at least till the problem is fixed,  its also a multi login clients that supports msn jabber and other stuffs ,  u can also install trilian google it.