have done a goole search and YPCLSP.DLL seems to be part of yahoo parental controls - do you have this installed?
the rpcss error seems to be security related
I would take a stab that you either have been infected by spyware of perhaps possibly a virus.
please post details of your operating system (xp?) and whether you run anti virus software, if it is up to date, whether you run a firewall, and whether you have any spyware scanning or blocking software.