It's very simple, you don't have to uninstall the current version of Kaspersky product in order to install a newer version, just visit here : http://www.kaspersky.com/productupdates , download and install your desired product and the activation information is automatically saved and relocated to the new version.(Upgrade Kaspersky AntiVirus & Internet Security 2009 & 7.0 To Kaspersky 2010 Versions)
Please take not that, you can only upgrade similar products i.e. from Kaspersky Antivirus (2009 & 7.0) to KAV 2010 and Kaspersky Internet Security (2009 & 7.0) to KIS 2010.
But, you got to read this ... but, you must have a valid genuine license to perform this upgrades. Otherwise, I don't know, maybe you got blacklisted.
So, upgrade now!!! From what I've read through many reviews, these 2010 line up is very good, great detections and able to remove various stubborn Malware infections in your computer.
Upgrade For Kaspersky AntiVirus & Internet Security 2009 & 7.0 To Kaspersky 2010 Versions