For users of NIS 2006 and I suspect NAV 2006 users, there is a major problem in SS V5.0 if the Spyware Installation Shield in SS V5.0 is set active. Norton locks up at random locations during a system scan and the only way to get loose is to power switch off. With the Spyware Installation Shield in SS turned off, NIS/NAV has no problems running a system scan. I reported this problem during beta testing but it didn't make the final cut I guess. I reported it on this Final release via the Webroot Support site. The conflict problem does not exist in V4.5 of SS. Clean install of SS V220.127.116.116 on Windows XP-SP2.