You can Reset Kaspersky 2009 for Trial version

If you do not use any key for ' Kaspersky'. Your ' Kaspersky Antivirus" will be disable after 30 days. But if you reset it you can use another 60 days. For that please follow below rule,

1. Settings -> Options -->'Enable Self-Defense' here remove tik sign and then click 'OK'.
2.Right click on System try Kaspersky's icon and then click exit.
3. From here download 'Kaspersky 2009 Trial Reset tool'
4. After download Run 'Kaspersky 2009 Trial Reset tool'. Finish
3. Then active you 'Kaspersky trial virson' for another 30 days.( Internet connection Needed).