Problem Installing NIS 2009

I have 3 pc licence. I tried to install it on my other PC but would not run. It installs and when trying to update, it vanishes. When I try to reinstall, it takes me to uninstall. I uninstall and then reinstall, smae thing. It vanishes after installation. There is an icon on desk top but nothing in system trey. I tries to download the 30 day trial version and the same thing.

 

Any help will be appreciated.

 

Noor Motani