Norton Internet Intrusion Prevention

Hi, have a new laptop(Windows 7)  with a trial version of Norton Internet Security on it - 40 days left on trial.  :Laptop crashed this morning and did a system repair. Now every time I log on it asks me to allow NIS to access the system and then I get an error message saying Intrusion Prevention failed to load error code 0x80010203; then it just wants me to upgrade my trial version. When i check the setting the intrusion prevention is switched off - when i try to put it back on it just goes to one click support and wants to upgrade.  Any suggestions other than uninstalling and installing the latest version, which will only give me 15 days free (funny that!)