I am currently running the complimentary 60 day version of NIS 2005 and I have to say I am very impressed with it thus far. Never thought I would see another Norton product that wasn't a major resource hog again but this one isn't. Anyhow I think I have decided to either renew my 2005 subscription for defs or simply buy the 2006 upgrade for $10 more. I have one other question that maybe some of you who have tried both versions caan answer. How does to NIS 2006 version do as far as resource usage over the 2005 version? Is it the same or heavier? In my searching the net I have com across a couple of articles where the reviewer mentions it being a hog on resources. I did not see any reviews mention that with the 2005 version and I can attest running it now that it is not. However I have to wonder if 2006 is a hog again, if it would not just be better to renew the defs over the upgrade. Thanks for any insight on this.