Click on the Product icon above and navigate to the downloads. You'll need to get the 9.0.1 and 9.0.2 patches and install them. Or, as Adam suggests, purchase the upgrade to AI10.0.3.
Thank you for your feedback - I'm looking into the patches before upgrading to 10.
Clear them all out using delete (purge). Then turn off everything Norton as a test. If things improve you can put stuff back until it breaks again.
Ok. Now you can put things back if you wish. Try each time and see if the problem returns. I recommend you put Norton's Undelete utility back last and even then make sure all .LST files are excluded.