If you want to uninstall Kaspersky Anti-Virus 2009\Kaspersky Internet Security 2009, do the following: 

• go to Start > All Programs 
• depending on the installed application choose Kaspersky Anti-Virus 2009 or Kaspersky Internet Security 2009
• in the menu select Modify, Repair or Remove 

• click the Remove icon in the open dialog window of the Setup Window 
• select one remove variant: 
• Complete uninstall - choose this variant if you want to fully remove the application and you are not going to use it in future. 
• Save application objects - choose this variant if you want to update the application version. For it delete old program files and registry entries and then run installation of the new version. The following objects should be saved: 
• Keep activation data 
• Anti-Spam database (for Kaspersky Internet Security 2009 only, if the Anti-Spam component was deployed and trained while in use) 
• Keep backup and quarantine files (the option is available only if malicious objects were detected and were backed up during previous sessions). 
• Keep protection settings (user settings of the Kaspersky Anti-Virus components). 
• Keep iSwift data (iSwift data to accelerate the application work) 
• Click Remove to continue.
• wait till program files and registry keys are removed 
• click OK

PC should be restarted after removal of Kaspersky Anti-Virus 2009\ Kaspersky Internet Security 2009 to finish the uninstallation process correctly. It is necessary to uninstall the application system drives correctly. You can restart the computer immediately or delay restart and restart the computer manually.

Once the computer is restarted, the application is completely uninstalled from your PC.

The dialog windows for Kaspersky Internet Security 2009 and Kaspersky Anti-Virus 2009 are the same but with corresponding product names