Have trial version and WG took on a nasty biggie, namely, "Sobig". This worm instantly corrupted my Norton AV and denied access to quarantine the worm. But, fortunately I have AVG also and it quarantined the worm. This worm did a freeze on Norton rendering it inoperable. However, Sobig corrupted 2 files in my System Restore. [have WinXP] I downloaded the Removal Tool from Symantec, ran it several times adhering to instructions; unistalled & re-installed Norton. I disabled my System Restore and ran the removal tool twice. All scans came out "clean" by AVG & Housecall & SobigFix. But, WG did it's thingie too but action taken did not show up on my screen when infected. As I was attempting to access SYSTEM RESTORE, WormGuard flashed this at me "Warning: For Security reasons this file has been blocked from executing". Okay, well & good but how do I deal with WG at this stage? Is it safe click on WG to allow files to run since I have run the removal tool after disabling SYSTEM RESTORE. Reason I ask is that this worm has the ability to re-instal itself again.