I don't fully understand your question..
"i would like a scheduler that let me run at bootup and after for example every 2 weeks at the bootup of the pc"
That doesn't quite make sense..
From what I can make out, I can say that I just use MSN Plus! feature - Task Manager. You set the time, date, links if needed, and if you missed it, the next time you log on it will tell you. Of course this is irrelavant if you don't use MSN Messenger...