Kaspersky internet security 2010 problem
There could be several reasons:
1. Make sure you don't have another antivirus installed in your system.
2. Make sure you are not trying to reinstall the Kaspersky's trial version again after the trial has finished once.
3. Make sure you are installing the software as an administrator.
4. Make sure you have the latest service pack of Windows installed in your system.
5. Finally if all the above points go negative then please refer to the Kaspersky support; they will give you a solution and make the software install. Find the link below for the Kaspersky support: