hello, To my knowledge Outpost Firewall Pro 3.5.631 had a security issue (say: 0-day) that An exception can be passed & then triggered by a local system user to the firewall resulting in a SYSTEM CRASH due to a overflow flaw in filtnt.sys (firewall driver) I was testing it on winxpsp2 (patchlevel latest) & other possibilities of remote exploitation. try experimenting with: cmd.exe c:\> mshta.exe longggggggggg string After upgrading to Outpost Firewall Pro ver. 3.51.759.6511 (462) the issue seems fixed. so secret fix huh ? --- Bipin Gautam http://bipin.tk Zeroth law of security: The possibility of poking a system from lower privilege is zero unless & until there is possibility of direct, indirect or consequential communication between the two...