peterh=> There is nothing in startup.In RUN of registry there is one strange thing named kalvsys.Removed it but it again gets entry into registry after restart.All others are win 2000's vital executables like msn,svhost,csrs,svxhost,svchosttt,bling,smsc,msblast etc.
alecstaar=>My PC is a stand alone having no domain.
Tried scores of antispwares including spybot,spyware doctor,zeroSpyware,Yahoo anti spyware tool bar list goes on and on...