1)Click Start Menu And Click On “RUN”
2)Type “regedit” and click OK
3)You will see the REGISTRY EDITOR
4)Navigate to “ HKEY_CURRENT_USER/Software/Yahoo/Pager/T
5)Here in right side panel, right click to create a new Dword value with name Plural and give it value 1.
Close the registry editor and enjoy multiple yahoo logins.