How to install it

Hello,

i bought a kaspersky internet security 2009 for 3 Users. i have install once and fillup user name and password too. but after i restar my computer..... i have put my computer for scan.... and then after i have restar my computer i did't see any icon on my desktop or there is no setup of kaspersky.... so let me know what to do now because i have allredy use my kaspersky user ID and password....... So letb me tell that how to fix this problame or how to install it again????