I had kalvsys on my PC which used to start popups and nasty toolbar when ever I connect to the network either at home or at office. With the excellent support from my office helpdesk from Network/Internet/End user helpdesk 3 teams, I was able to completely remove the same. It's really a smart one. I remember from last week so many times I deleted the registry entry/the software but still everytime I connect to the network it pop's up.
After 5 frustrating days of using SpyBot, the freeware version of AdAware everything what not, today in the afternoon I had the taste of success.