Running Windows XP-SP2 HE (fully updated), 1.5 gbyte DRAM, 2.6 ghertz P4, Dell Dimension 8200. Software: PG3.410, NIS 2006, SuperAntispyware, Trend Micro Anti-Spyware, TrojanHunter 4.5, Ghost Security Suite (AppDefend disabled), StickyPassword, HostsMan 3.0, Advanced Windows Care Pro V3.0, MS Office 2003, WeatherPulse 2.0.5 (Build 36). Have been running PG3.410 successfully since the first day it was released. In recent days, I have been trying to figure out why IE7 RC1 would not install on my system. It would install; however, on the first reboot, it would not complete installation/setup and the system would lock up without even the taskbar showing. I've tried various program removals, deactivations, and even removed NIS 2006 totally. Finally today, I removed PG 3.410 and VOILA, IE7 RC1 is up and running along with everything else on my system. If I reinstall PG 3.410, the system will not boot up. The desktop appears, no task bar, and the only way to shutdown is to power down. I've tried resetting pguard.dat and pghash.dat and even that makes no difference. Something between IE7 RC1 and PG 3.410 is not working! I did have IE7 Beta 2 and Beta 3 working okay with PG 3.410....but...RC1...no way. UPDATE-UPDATE: This problem must be inherent with IE7 RC1. It reappearred with PG 3.410 not installed and when I re-installed NIS 2006. Thus, IE7 RC1 has been removed, PG 3.410 re-installed, NIS 2006 re-installed. SORRY for "blame" to wrong process.