Configure which folders/files are purged?

Installed Norton Security Suite on a new computer about 6 weeks ago. Today, I found out that it is deleting files from c:\temp during system optimization. 

I suppose many people use c:\temp for very temporary but I've been using it for short-ish term files that hang around for... months sometimes but don't need to get backed up.

I tried renaming c:\temp but still, Norton found and purged this folder.

On my previous computer, Norton never touched c:\temp.

Meanwhile, c:\users\<me>\appdata\local\temp has lots of junk that was not touched.

How can I configure which folders are purged and how old files have to be in order to get purged?